I think you really need to do some anatomy and facial structure studies. It will help a lot and you'll be extremely happy with the results.
The eyes need to be high way up on the face. Basically, the whole face is too low. The eyes are too far apart. What it really needs is a narrower and smaller head; the head and neck is just very large it seems when compared to the body. You've shaded the face as if it were balloon shaped. Also, your light source isn't consistent. The arms are different lengths. The collarbone is in the wrong place/angled oddly.