The only way you’re REALLY going to learn is be actively using things. If everything is just working, GREAT! That’s all you need to know. Just keep enjoying it.
If there something specific you are using this for, let us know and we might be able to help you out.
That being said, one of the easiest to force yourself to learn where everything is, is by using the CLI instead of GUI wherever applicable. Install packages, do updates, change settings…etc.
Boxscape