Do you have a preferred guide on modern Android development?

I'm looking for something that goes through building a jetpack compose app with storage.

I find linking the UI state with data updates really confusing. I can get it to show up, but updates are inconsistent/jumpy.

I've been working on a project where the source of truth for the data is actually coming over a Bluetooth connection, and my code feels like a mess. I want to see what good code looks like from scratch so I see what parts of my code are salvageable.