I've never properly used watercolor (except, in like... the equivalent of Middle School where I live)

I have been drawing for a while, but haven't drawn in like, a year... I'm getting my rust off.

I want to try and learn how to properly use it. I'm enjoying it a lot for the moment.

Although I'm struggling with handling saturation and such.

(Let's not comment on the directions of the shadows, I know I fucked up)

Any tips? Any comments?