Where to start learning Android databases?

Question

Android

Briefly: where to start? whether to learn how to work with SQLite or use libraries right away (ROOM DB)? I would be grateful for some sites / books / courses (I write in Kotlin)

Very long:
I set myself a goal, a small pet project, an application for creating notes. The choice was just that, because I was going to learn how to work with a database on Android. As I understand it, you need to use ROOM DB. I found training videos, but they don’t cause anything but horror in me. In general, I understand what is happening, I can imagine how it works, but it’s impossible to remember all this during the video (and it seems to me that I have to learn it all by heart), but the main problem is that I can’t take a step away from the tutorials , too complicated and complex + there are topics that I have not yet touched. I'm lost and don't know where to start, thanks in advance.