Greek Mythology Picture

I have to make a tie based off a culture for my art class, so I picked Greece and based it off Mythology. Mostly because I can secretly make this Percy Jackson fanart. This is what I have so far. I've never really tried painting anything before, so I'm pleased with how its coming out for now. That'll probably change in the morning though. I'll end up finishing Hades and Poseidon later.

Ps: Its Medusa at the top, then grape vines, then Zeus, and at the bottom we have Hades on the left and Poseidon on the right. Just in case anyone was wondering.
Dragon head
Greek Mythology
Monsterous woman