Here's my two cents.
Tough question. Too many feels can be described and they are always changing or evolving. I think you could focus on either are/hand and do okay.
1. The pivot gets the arms moving. Your belly button moves before the clubhead does. Brian refers to it as "work" in the good sense. I think it is in "Flipper."
2. You will need to train your right arm to want to stay long. When you can do this you won't need to think about it anymore. Your right arm keeps your left arm straight-ish.
3. On the downswing hit the crap out of the ball. Use your hands, body, buttcheeks, whatever. If you can take a divot (iron shot) on the target side of the ball and the ball doesn't curve too much, you are onto something and bet all of your buddies, cause you'll kill'em.
Merry Christmas