Ask Your Elders: How Can I Be Better At Art?

My unsolicited opinion on the second one is that if you want to improve as a visual artist, and especially if you want to diversify your styles and escape a particularly cartoony one, is that you should take some life drawing classes (or, failing that for accessibility or financial reasons, start practicing from posable 3d models); the greater levels of abstraction a piece reaches, the more it deviates from literal visual human perception, and the more you understand and can replicate those "rules", the more you can break them in a conscientious and effective way. Starting with cartoons is a difficult way to internalize the way people and things move and exist in physical space unless you have a very intuitive understanding of physical relationships.

I am personally a very mediocre visual artist I think because I struggle to do what I've advised above (on top of having very poor fine motor skills).