The Notion database structure I use for every digital product shop
Four databases, one relation, and a rule about not adding a fifth until something actually breaks.
Most shop owners start with one giant table called Ideas and then wonder why nothing moves. The problem is not discipline, it is structure. An idea, a product, and a task have different lifecycles, and squashing them into one database means every row carries fields it does not need.
I use four: Products, Assets, Customers, and Tasks. Products holds one row per thing you sell, with status, price, and launch date. Assets is every file, draft, and thumbnail, related back to Products. Customers stores buyers and the questions they asked, so support becomes a search instead of a memory exercise. Tasks is the only database I touch daily, and every task links to a product.
The one rule that matters: do not add a fifth database until something actually breaks. I added a Content database once because it felt tidy, and within a month I had two places to check for the same information. If a view or a filter can solve it, use that instead.
Start by duplicating what you already have into Products and Tasks. You will feel the difference the first week, when you open Notion and immediately know what to do next instead of reorganizing for an hour.