Learning Path
E-commerce Fundamentals Path
E-commerce is selling physical products online. This path teaches it the honest way: the models compared side by side, the costs most beginners forget, and the maths that decides whether a store makes money — before you buy stock or spend on advertising.
How this path works. Each lesson below is a short summary written for this path, with a link to the full guide. Work through them in order, do the exercise, and mark each lesson complete when you have read the guide and done the work. The two-question check under each lesson is for yourself — it is not scored and it is not a certificate. Your progress is stored only in your own browser, in local storage — no account, nothing sent to us. Completing this path gives you no certificate and no qualification, and it promises no income: the proof is the work you can show at the end.
What you will learn
- Compare e-commerce models — dropshipping, print on demand, own stock, marketplace — honestly.
- Research a product by validation, not by hype about winning products.
- Work out profit per order, including fees, advertising and refunds as a loss.
- Plan fulfilment, shipping and returns before the first order arrives.
- Measure what it costs to win a customer against what that customer is worth.
Your progress
0 of 6 lessons complete.
The lessons
Read each lesson summary, then open the full guide it links to. The summaries are written for this path — they do not repeat the guides, they prepare you for them.
Lesson 1: E-commerce business models
There is no single way to sell products online: dropshipping, print on demand, buying your own stock, and selling through a marketplace each hand you a different balance of cost, control and risk. This lesson compares them on the same terms — what you pay up front, who holds the stock, who handles a return, and what happens when the supplier fails — so the choice is a decision, not a guess.
You will learn why the cheapest model to start is often the hardest to make profitable, and why holding stock is expensive but gives you the control that customers notice: faster shipping, quality you have checked yourself, packaging you chose. The guide works through each model's real costs, and links to the model comparison tool, so you can score the models against your budget and your tolerance for risk before you spend anything.
Exercise: Score the four models against your budget, the hours you can give, and the control you want over quality and shipping.
Check yourself — two questions on this lesson
1. What does each e-commerce model trade off?
Cost, control and risk — a cheap model to start usually means less control and thinner margins.
2. Why can holding stock be better than dropshipping?
You control quality, shipping time and packaging — the things customers actually notice.
Lesson 2: Product research by validation
Product research is not finding a winning product; it is testing whether a product will sell, at a price that covers its costs, to people you can reach. This lesson teaches validation: check that people search for it, check that the price covers product, shipping, fees, advertising and refunds, and check that you can reach the buyers for less than the margin allows. A product that fails any one of those checks is not a product yet.
You will learn why product hype is dangerous — a product everyone is selling is a product whose margin is already gone — and how to read the evidence instead: the search results, the reviews of competing products, the shipping times and prices that customers complain about. The guide covers the validation sheet you will fill in for the capstone, and why one honest check beats ten videos about trending products.
Exercise: Choose one product and write the evidence for each validation check: searches, price maths, and how you would reach the buyers.
Check yourself — two questions on this lesson
1. What is product validation?
Testing whether a product will sell, at a price that covers all its costs, to people you can reach.
2. Why is a product everyone is selling a bad bet?
Because the margin is already competed away — and its problems are already reviewed publicly.
Lesson 3: The dropshipping guide
Dropshipping means you sell a product you never touch: the supplier ships it to your customer after the order. This lesson explains the model as it actually works — including the parts the sales pages skip: shipping times from overseas suppliers, quality you cannot check, returns that come back to you, and a supplier whose mistake becomes your review. It is the honest version of the most-hyped e-commerce model, and the longest lesson in this path for that reason.
You will learn the full-cost maths that decides whether dropshipping pays: price minus product cost, minus platform and payment fees, minus advertising per order, with refunds counted as a loss, not as a free order. The guide pairs with the profit calculator, which also shows the break-even ad spend — the most you can pay per sale before you lose money — and the break-even ROAS. Read this lesson twice before you spend on advertising; it is cheaper than learning it from a bill.
Exercise: Use the profit calculator with a real product's figures and write the most you can pay per sale before you lose money.
Check yourself — two questions on this lesson
1. What is dropshipping?
Selling a product you never hold: a supplier ships directly to your customer after an order.
2. Why are refunds a loss in dropshipping, not a free order?
Because you have already paid the product cost, shipping and fees — a refunded order keeps those costs and loses the sale.
Lesson 4: Store profitability, honestly
A store is profitable when its unit economics work — when each order, on average, leaves money after everything it cost to win and fulfil. This lesson teaches that maths without the hype: contribution per order, fixed costs, and the number of orders needed to break even. It is the lesson that turns a store from a hope into a calculation, and it is the one most beginners skip, which is why most beginners lose money.
You will learn why revenue is the wrong number to watch — a store can sell every day and lose money on every order — and which numbers to watch instead: margin per order, cost per customer, and orders to break even. The guide links to the profit, CAC and LTV calculators, so each number in the lesson is one you can compute for your own store. By the end you should be able to say, for one product, how many orders a month you need before the store pays.
Exercise: For your product, work out the contribution per order and the orders per month needed to cover your fixed costs.
Check yourself — two questions on this lesson
1. What decides whether a store is profitable?
Unit economics: whether each order, on average, leaves money after all its costs.
2. Why is revenue the wrong number to watch?
A store can sell every day and lose money on every order — revenue alone hides that.
Lesson 5: Fulfilment and returns
Fulfilment is getting the order to the customer: picking, packing, shipping, and handling the return when it comes back. This lesson covers the decisions a store must make before the first order — who ships, how long it takes, what shipping costs the buyer, and what happens when a product arrives damaged or wrong. Returns are part of fulfilment, not an exception to it, and a store that has no returns policy will invent one under pressure from its angriest customer.
You will learn the trade-offs: fast shipping costs more and earns trust, cheap shipping costs less and earns complaints; free shipping is never free, it is a cost absorbed into the price. The guide covers the returns workflow — who pays the return shipping, how quickly refunds are issued, and how a fair returns policy becomes a reason to buy rather than a reason to leave. The shipping calculator helps you price the choices before you promise them.
Exercise: Write your fulfilment plan for one product: who ships it, how long it takes, what shipping costs, and what happens on a return.
Check yourself — two questions on this lesson
1. What does fulfilment include?
Picking, packing, shipping, and handling returns when they come back.
2. Why is free shipping never free?
The cost is absorbed into the price — someone always pays it, and the store must decide who.
Lesson 6: Customer acquisition: CAC versus LTV
A store lives or dies on one ratio: what it costs to win a customer against what that customer is worth over time. This lesson teaches both sides — customer acquisition cost, the total sales and marketing cost divided by new customers, and lifetime value, what a customer spends over the whole relationship — and why neither number means anything alone. A store can survive a high acquisition cost if customers return; it cannot survive a low one if they never do.
You will learn to measure CAC honestly, with period-matched costs and customers, and to read the ratio without the usual self-deception: lifetime value is an estimate from your own retention, not a figure copied from another store. The guide links to both calculators, and ends with the capstone — your product validation sheet and full-cost calculation from the whole path, ready to be tested small or set aside honestly.
Exercise: Capstone: finish your validation sheet — the product, the full-cost profit maths, the fulfilment plan, and the CAC and LTV you would need for it to pay.
Check yourself — two questions on this lesson
1. What is CAC?
Customer acquisition cost: total sales and marketing cost divided by new customers in the same period.
2. Why does CAC mean nothing without LTV?
Because a high cost to win a customer is fine if they return — and a low cost is fatal if they never do.
Try the tools
These free tools let you practise what the lessons describe — everything runs in your browser, and nothing you type is sent anywhere.
- Dropshipping Profit Calculator — profit, margin, break-even ad spend and break-even ROAS
- Customer Acquisition Cost Calculator — what each new customer costs
- Lifetime Value Calculator — what a customer is worth over time
- Shipping Cost Calculator — shipping costs and free-shipping thresholds
Check what you learned
6 questions, all based on the lessons above. Answer them all, then check your score — each answer explains itself, so a wrong answer teaches as much as a right one. The quiz is practice, not a test: there is no pass mark and no certificate.
Answer all 6 questions, then check your score.
Download your notes
Download a plain-text summary of this path: the lesson list, which lessons you marked complete, and your quiz score. The file is generated on your device — nothing is uploaded.
Key terms in this path
The Glossary, CAC, LTV, ROAS, Markup vs Margin define the terms this path uses. If a lesson uses a word you do not know, look it up there — each term page also explains the idea with an example.
Frequently asked questions
Is dropshipping profitable?
Sometimes, for some products, for some sellers — and the honest answer is that the margin is decided by the full costs, not the selling price. Advertising, platform and payment fees, and refunds take most of the difference between the product cost and the price. Lesson 4 teaches the full-cost maths, and the profit calculator shows it with your own numbers.
How much money do I need to start an e-commerce store?
That depends on the model: a print-on-demand store can start with almost no stock cost, while holding your own stock needs money in products before the first sale. Advertising is the cost beginners underestimate most. Work through the startup cost calculator with real quotes before you decide.
Do I need to hold stock?
No — dropshipping and print on demand exist precisely so you do not. But not holding stock means less control over quality, shipping time and returns, and the supplier's problems become your problems with the customer. Lesson 1 compares the models so you can choose with your eyes open.
What is the most common beginner mistake in e-commerce?
Counting the selling price minus the product cost as profit, and forgetting advertising, fees and refunds. A store can sell every day and still lose money. This path exists to make that mistake visible before it costs you real money.
Is this path a certificate course?
No. There is no certificate attached to this path. What you finish with is a product validation sheet and a full-cost profit calculation — the proof is the work, not a document.