Typically hooks are caused by coming from the inside, getting your hands stuck and flipping the club to get to impact. Cure this by focusing on swinging your arms through to your left side and turning your body through to the finish.
Hit this similar to a sand shot with an open face, steep backswing but not much of a follow through
Thin/Topped shots are not caused by picking your head up but rather lifting your entire body, concentrate on keeping the same posture throughout the swing