I started golf 20 years ago casually with only friends and coworkers helping me with my swing. My swing is very inconsistent with most of the problems that many amateurs have, hitting the ball fat and thin and flipping at impact. I finally decided to take lesson and on video my swing looks terrible. No weight shift, backswing too flat, too much movement in right knee and then flipping at impact is confirmed.
The instructor is trying to help me with weight shift, and a backswing that is more steep, left shoulder position pointing at the ball, and left wrist bowed. It feels so unnatural. I