try putting a small range ball bucket between your feet. this will stabilize your lower body. then hit balls with half swings until you get the feel of rotating your upper body. on the backswing back should be to the target, on the foward swing chest should be facing the target. Take it easy at first because this drill can put a strain on you lower back. relax the arms and let them go with the rotation of the larger muscles of the chest and back.