Making mini swings with your elbows glued to your body will give you the correct sensation of the large torso muscles swinging the club, not the arms
Try these two new ways to hit this difficult shot with some spin for control
An inside out swing approaches the ball on the downswing from too low, hitting the half of the ball closer to the player, causing a push or hook which requires the player to work on getting the club further up and out on the downswing