welcome.... your swing is too outside to in. thry to visualize your swing path going strait out to the target line maybee a little in to out. that is what i do to fix my pull., how far are you hitting it? it sounds to me like you are casting, to help with that go to this link, it gives me a lot of power and accuracy.

http://members.cox.net/gregjwillis/LESSON1.htm

try readin thread on the "hand shake drill"

and try to relax more.... if your hands and arms are relaxed they just fall in place on the downswing, you dont have to help them out.