If you were to combine what you did here with the first attempt, it would be great... In the first attempt you shaded the arm essentially like a cylinder (i.e. you were thinking about primary forms). In this one, you seem to have forgotten about the primary form, and only considered the secondary forms in isolation. I think Stan once said that when he's shading, he's not shading the primary form first, but he's thinking about the primary form while shading the secondary.

I think there are some issues with your structure. Here are a few things I noticed: -The right eye is too big, while the left eye is too small -The eyes don't appear to be looking in the same direction because the ovals of the irises have different proportions. One is much narrower than the other -The eyes, eyebrows, bottom of the nose and mouth are not aligned. They should be fairly parallel. -The right eyebrow seems to merge into a shadow in a way that makes it look too big and misplaced. It also makes her look angry, I think, while in the photo her eyes are very calm