Looks like you are not fully turning your shoulders on your backswing. I can't tell from the video if you're turning your hips enough yet, but keep in mind that at the top of your backswing you want your shoulders to be perpendicular to the target line. Your hips turning and your shoulders turning together will allow you to make a full turn.
PS: I really like your dog just chilling in the background, haha. Does he ever chase after the ball?