That is a great post for React Native. I have only worked with Vue.js, but now I am very interested in learning React so as to be able to work with React Native as well as React for web application.
The next thing that was great because you did mention it, is the Flexbox concept. I am in a situation like you and I am still uncomfortable with it, but I see that it is a must. There is also a complete tutorial of Flexbox by `css-tricks`.