If you would like to use react-native-vector-icons for your Toolbar icons, you can follow this example or this gist.
Redux can be easily integrated with RNN, follow this great blog post for instructions.
If you prefer Mobx over Redux, show your interest in this thread. Also checkout @mastermoo’s POC of using navigation with Mobx.
Check out this link to find a small boilerplate for RNN + MobX (w/ Provider).
Boilerplate for integrating redux-persist can be found here.
A detail tutorial about how to correctly implement Splash Screen with RNN: Article Link. Note: The article use third-party tool name RN-Toolbox (optional) to generate Splash Screen assets.