I made this sketch for a Halloween drawing. The concept is making my character a zombie. I would like to know if I have to change anything before starting colours and rendering. Like if I could improve composition anatomy or anything really Any advice would be appreciated! :}

I made this sketch for a Halloween drawing. The concept is making my character a zombie. I would like to know if I have to change anything before starting colours and rendering. Like if I could improve composition anatomy or anything really Any advice would be appreciated! :} | Artwod Feedback