If you want to create a mobile app and you don't know how to start, you can choose React Native and Expo.
In React Native documentation, the slogan is
And Expo documentation says:
Using Expo you won't waste time configuring your setup and you can quickly start developing and emulate the app using your mobile phone (this is one option).
The nexts post Im going to show the simple steps to create a basic app using React Native, Expo and configure google maps and some other functionalities.