Usually the best way to teach something is by building something that already exists.

When I want to learn something, I do search for an already existing app' that do use the language/framework/lib that I want to learn, then I do replicate it from design to features.

This permits to master both the View logic and the Business logic behind the views.

This is IMHO the best learning methodology and I had wish this would have been how we were reached at school. But it was not.

🤘

I'm a beginner and i think the way how data flows through the components from parent to child or from child to parent is very hard to understand.

If you're new, first you should read about the basic concepts of React on their documentation. Then try to build a simple application by following the youtube series here. Once you complete the application, you'll definitely have confidence to build your own app.