Well, first off, nice work here, this looks pretty good~!
However, there are many things I think that can be improved upon. The right arm (left in the picture) is way too disproportionate. It looks way too small compared to the one on the left (right in the picture), which suits the body well.
The legs look pretty good, however again, they are sort of disproportionate. The right leg is bigger then the left, and that makes it look a tad bit awkward.
But its not all bad, the face does look pretty good, I like the way you did her hair. The glasses are a little bent, it seem like you tried to conform them to her face a little too much. Lastly, the nose doesn't look too natural, almost too big and oddly shaped for the face.
But don't think I hate this, I do think it is good. Like the coloring, I think you did fabulous on the colors~! No complaints there.
But, like anything, with time and practice, you will get better. I hoped this helped, and I look forward to everything you do in the future~!