I find your background is fighting with your subject. I would suggest playing with your composition lines and colors, to help bring your subject to the attention of the viewer, right now my eyes don't know what to look at.
Now artistically, I find your female subject in good proportions, I would like to see the other wing somewheres, unless she's supposed to have a single wing.
Besides that a very SOLID start

keep it up, looking forward to your updates!
-agentxi-