/ic/ - Artwork/Critique

Still very much a beginner despite three years of art-school.

I am lacking in a lot of departments, I mostly stick to drawing and penmanship (in which I am no means a master either) but I want to branch into more painterly aspects.

I'm having a big issue of creating contrasting elements in my pieces, pic related.

Are there any specific theories or ways to approach my issue? I've seen some links in regards to color theory, but I also wanted to hear a general critique as well, if anyone is up for it.

Thank you.