[Mike McCarty]

I think you did say this was to be a pencil drawing. If that's the case you should eliminate the color right away.

If I "had" to do this, this would be the best reference I could create from this photo. No doubt it has a lot of limitations. And I don't know what you do with her mouth. You would surely have to go beyond what is given to you here. This puts a lot of pressure on you to create.

This is why I would create as much space as I could. When you are staring at this with the sides so closed in you tend to focus on all those shortcomings, if it were in a broader field with a stronger composition I think it could help, not cure, those limitations.

I'm not trying to talk you into this, I just enjoy the puzzle.

Best case would be to lose this and do them currently as was pointed out by my two heroines above.