Which is the best Android Project Structure 😂 we beginners always wonder and the experts tell us to Google, am I a wrong googler

No such thing. Choose something you like, and can learn from, and makes sense to you.

I once had to refactor an app that was on love with the idea of DataLoaders. Everything had to be dataloaded bc "that was the best way to do it". Refactored the thing to use a proper event based data caching around an actual database.

You can look at Google's example apps, like sunflower (https://github.com/android/...).