I like the shading on her left side; it looks really good dark. Shading the area between her eye and nose on the right side to balance out the darkness would be cool. Also more shading under her right cheekbone and behind her far nostril would look good.
I like making it dark first then scratching out the light portions instead of building up from the light areas. But that’s digital, idk if that method works well with your pencil.