The golf swing is nothing more than….”a swinging wrist cock and a swinging wrist uncock”.
If you make it any more complicated then follow the marketeers (more tips, more money).
John Gerring, PGA
Sorry…..an additional thought…..at the starting position you have a long left arm and a short right arm. At impact you want your short arm to have room to straighten into a long right arm and the previous long left arm to become shorter. My apologies to left handers!