You don't need to launch with dozens of products. Starting with 3–5 items you're confident in lets you test market response before expanding.
Hong Kong online stores typically fall into three product categories:
Physical products — clothing, food, homeware, handmade goods, beauty and skincare. Requires inventory management and logistics planning, but customer expectations are clear and the return process is well-understood.
Digital products — ebooks, courses, design assets, photography. No inventory pressure, infinitely scalable, but requires clear licensing terms and a reliable delivery mechanism.
Service bookings — tutoring, photography, nail services, consulting. The store serves as a booking and payment channel, reducing manual follow-up.
There's no universal answer on what to sell — but a practical starting point is to begin with what you already have in stock or can already deliver, rather than sourcing new inventory just to open a store.