Ken Kaneki (Pencil Sketch)

A pic I recently drew with pencil. I'm planning on doing a Tokyo Ghoul art piece which I'm hoping to get finished within a week. I'm hoping I can correct the mouth area's size and the hand when I work on it in Photoshop
I've found that doing art based off of anime or manga is hard for me to get the line art right when I use my tablet because I want to be specific as possible. If I ever do fan art I'll do the sketch traditionally