I'm 73 and it's really tough to make physical changes. The best way is to try anything new with a 1-step drill. That slows everything down and makes it easier to feel what's happening.
I also use physical check-points during my approach to help me stay physically accurate, otherwise I can be all over the place.
I have a 5-step, so my first check is to flex my wrist and relax my grip pressure. The next check is to make certain I start my ball on my second step. The next check is to make sure I have a proper cross-over step. Next, I want my ball dropping down and swinging back as relaxed as possible. Next, I want my 4th step a little shorter to give me a nice leverage position on my 5th step/slide. Next, and this is really tough, I need to wait for the ball to move forward without my help. Being relaxed at the bottom increases RPM's and ball speed. Finally, I like to have a solid finish position. At 73, with back surgery and shoulder surgery, I don't have classic form, but I can post up most of my shots.
The 1-step for making changes is the best tip.