Lesson #1

You can see the difference in setups between you and PGA Tour player Nick Watney. Work on getting your hips more neutral and under your torso. They look a little open and ahead of your upper body which causes the leaning back compensation. Your shaft is leaning backwards where his is leaning forward and his head is centered over the ball. This setup would explain why you tend to hit behind the ball with an open face or hit it thin.

Driver setup seems to have similar issues as Iron setup. Hips slightly open and ahead of the upper body which is causing you to lean back. Hands and shaft hanging too far back which is giving hands bad sense of where and when to release the club.

As far as the swing plane goes you can see yours is attacking the ball a little too far from the inside which is a compensation from your setup. This can cause fat, thin, pull shots when not timed correctly. PGA Tour player Kevin Kisner on the right demonstrates the right way to attack the ball with an iron to ensure ball first contact is made.

Here you can notice that your body and target lines match up but clearly the ball is taking off left of that direction. Club face is closed to the target line so the ball starts left. A big reason for this is the early extension of the trail arm. If the trail arm unloads too early then the wrists need to be timed much more precisely and can cause pulls, fat, and thin shots. Your trail arm early extension I believe is a direct result of a poor setup.