Use your eyes and vision to change your ball shape by getting your torso on top of your lower body to cure your hook
Keep your eyes directly over ball, shoulders parallel and putter face perpendicular to target line and head still
A common mistake on the backswing is to hinge instead of cock your wrists, a perfect drill to help fix this is to pre set your backswing by cocking your wrists right up in front of your face at address and then turning into a full backswing