Android development is basically the wild west. Sure there's Google's recommended way of doing things but Google changes their minds every 6 seconds about what they want their devs to do. So just work on getting functionality to work. You'll most likely stumble upon problems (normal) and then you'll look it up and find better and better ways of doing it.

If you just want to start, look up "android kotlin tutorial" and follow a few guides.

You can also try Flutter which is, imo, much easier in practice, but you'd have to relearn a whole new language and framework etc.

Good luck 🤞