Hi! I am no expert but some things I can see are that the hairline feels a bit off. I kind of looks like a Background instead of the hair being part of the head. Another thing is the values on the left part of the drawing, Maybe you could have done more exploration there. When I did this exercise I noticed that the brightest part is the reflection on the nose, the rest of the face does have some tone. Again, I am not an expert, just started the course as well