That's super good stuff. Really, I can get behind all that. I would also like to add the following. Apologies as I assume everyone knows all this but if not here are some more good tips. Dont discount the mental game. Its key and critical to playing well.
Lose grip is a great idea, wrists as well. But how the club is gripped is paramount. Without making too fine a point it must be gripped strong. The triangle of left hand thumb and pointer must be from right nostril to right shoulder.
The spine and stance, key. Right foot exactly 90 degrees to target line/stance line and left foot slightly flared. Foot line, knees, hips and shoulders all dead parallel to target line. Those lines one side of train track and target line the other. Ben Hogan said in his book if someone is standing with feet out, he didn't know which side they were going to swing from.
Like the left side thinking. A similar thought kept me in the 70s for months about 3 years ago. Particularly the left wrist, it must be firm if not pronated. That single thought helped my brother in law begin to develop into a fine player. These simple thoughts are the fundamentals. Every shot, range and all. When pros say I'm working on the fundamentals this is what they are talking about. Last thought on stance, leadbetter, everyone, for stance grab a club and hold at neck and low back. Feel straight back. Bounce a little, slight knee bend. Forward tilt a little. Straight back, knee bend, little tilt. Basically getting in position to hit a ball.