How can I learn React native to build a mobil app?

Question

Are there any course to learn React native or websites

Answer 1

https://m.youtube.com/results?search_query=react+native+tutorial&sp=EgIQAw%253D%253D

Answer 2

A good way to get started would be by looking at Facebook's own tutorial:
https://facebook.github.io/react-native/