Good job. :3 What I would suggest would be to smooth out the coloring in the face a bit more. The coloring in the shirt is wonderfully rich. You can't see the strokes at all. However that makes a large contrast to the face. I am curious. Was the shirt colored in a different medium.. such as pastels? and the face in color pencils? The reason I am asking is because the redness of the shirt is extremely rich in comparison to the skin.

Actually, pretty good for no reference. I know how hard it is to draw like that! Keep up the good work!