The various parts of the swing should start back in this order: clubhead, hands, arms, shoulders, hips. Your right arm should stay close to your right side, so don’t force a straight-back takeaway. As the hands pass the right leg, weight should start shifting to the right.
When the club reaches parallel to the ground, it should also be parallel to the target line — that shows the club is swinging on the correct arc. The clubface at that point should be toe up, making it square to the swing arc.
For your body to move as freely as possible, you have to start in balance. Your weight should be in the middles of your feet, both left to right and back to front.