probably go through this tutorial first: https://scratch.mit.edu/projects/736267460/ this one really focuses on improving color theory specifically.
I know a lot of you are thinking "what brush do I use for this??" Just use the "fancypants" brush by papa kfc for all painting (that's what I did), you should find it easily searching it up. The download is free and on deviantart :) I used the pixelstains brush mentioned in the last tutorial for sketching. If you're looking for that guantlet thing just look up Wesley Gardner Guantlet Method and you'll find the video.
