Lady of the Enchanted Forest

The first thing that strikes me here is the pose and what's happening here. I'm unsure based on gravity, whether she's supposed to be supported by the ground reaching for the butterfly, or if the butterfly is somehow actively pulling her up. The reason is that the center of gravity of the figure isn't being visibly supported. If she's standing on the ground on her own weight, she won't be for long, and if she's being pulled up by the butterfly, her body isn't adequately showing how her weight is reacting to being pulled by gravity. She's kind of in a state of limbo, not enough in either direction to clearly give an idea of what's going on.

Anatomy wise, there is generally good knowledge of the human form going on.

The composition is very centered, and could probably benefit from shifting the frame in reference to the subject some. Odds on chance is that slightly off center is more interesting than dead-on center.

The perspective of the background seems hardly developed as well. The grassy area reads more as flat shape than as a space that can be moved forward or back into the picture plane. Hence things like the rabbit seem to float without purpose. The only indication of a horizon line is the top of the grassy shape and there are no real lines of convergence towards a horizon being formed by anything.

It almost feels like the background and the figure were created separately with their own intent and brought together as an afterthought. They feel very much like they do not belong together.

Lastly,when you're already using so much green, and the saturation levels don't show much contrast, it's going to bring more attention to how you use your light and dark colors, and in this case, the bright light placed right next to the character's left arm makes that spot advance forward to the point where what little depth was being generated seems to all but disappear. There are a whole bag of tricks to explore in creating depth. Perspective, tone, color temperature, saturation (intensity), overlap, and vertical distance from a clear horizon are just the ones that come to mind at the moment, and I think this could benefit from just about any one of those in more measure than are currently here.