[unbendable]

Official React documentation is actually fine. However I have been using it with a backend which provided an API. I have to admit that I rarely see React Applications directly bound to a database (if you meant that, not quite sure). But I would guess that in such a case you're better off with some typed language like Type Script.

To start off I would use the create react app. It sets up a project and all the required settings for babel, linter and all that magic is behind a curtain. Again the documentation is fine for starting. And remember React is just the view library. If you need (global) state management look at redux or mobx, http client axios and read their documentation.

I started 3 years ago with React. Back then i just used the documentation. Now i follow Dan Abramov and other React Maintainer / developer (like Sophie Bits) on twitter and I learn a lot of internal or advanced stuff about react. I definitely would recommend following them.