If you are still in school, you might look into whatever art program they have. I would definitely suggest studying life drawing/still life/anatomy. However that is just standard advice. The journey of an artist is a long one, so it's good to get a start on the basics early, it will make things easier later on. Don't stop drawing the stuff you love to draw though and keep posting here!
A: Because everybody knows that white is the default race.
I don't get to practice anatomy enough, therefore my stuff is nowhere near the quality of everyone else's.
The latest upload happens to be better than my older stuff (A lot of my older stuff was made before I studied anatomy from an online tutorial). Sorry about the darkness of the image; there was nothing I can do.