Hi Danni. Love this piece so far. I personally really like the background you've chosen and think it's in harmony with they colors and values you've chosen for her- it really looks like her lighting belongs with her environment.
A few things I think could possibly improve it are:
Perhaps cropping it so that she is more on center.
Go a little darker on the shading of her skin and give it a tad more warmth.
The way you've rendered the feathers is absolutely gorgeous, and I think if you give her hair and perhaps her coat the same type of graphic rendering, it would really unify the piece. On the same note, I'd simplify either her hair more or her coat, so that it contrasts better. Right now her hair and coat are equally busy and I think they are competing too much for attention between them.
Darken the coat a bit to allow the face to stand out.
Watch the tangent of her hand and the edge of her coat.
Here's a paint over to show some of what I mean. I hope you don't mind.
I think you are 90% there. Really well done, and very compelling!