you know, there is a rather simply exercise or drill if you will.
you put the feet together and you just naturally swing like a pendulum. back and forth, back and forth
your golf swing is in there and your hips just know (where they need to be)...
Open.
For me, if I do that consciously with the hips themselves, I hit shanks. So far anyway.
I like to swing my arms left of my left hip.