Nice! You have an interesting style already, i'd like to see you develop it.
On the issue of anatomical correctness, this character has very long legs. Or rather, she has long thighs, and a very short torso. The issue is in the proportion between the two. Her legs would be starting closer to where the rim of her skirt is:
Long legs might be what you're going for, but it's good to know the realistic proportions, if you're having problems with that. Hopefully i could help!