TL;DR Create an iOS and Android app with a Firebase backend and a No-Code frontend with AppGyver.
I discovered this Udemy course by @ezzato today: Firebase meets AppGyver
He also has a Youtube course on AppGyver: Appgyver Absolute Beginner Tutorial
Good luck on your new side-hustle @ezzato !
I picked this up on Udemy last night. Will get started on it later today.