So many golfers would get better by simply improving their address posture. In my experience one common trait among elite players is that they are very aware the ground under their feet and how it can best be used to create stability and power. They get into a position where their legs are like shock absorbers and they’re poised to use the ground to create force.
One thing you can do to get a feel for this is to try making some swings in your bare feet. Sometimes it’s as easy as placing your focus or attention on what your footwork is like during the swing. Try to become aware of how and when your weight moves left and right and also from heel to toe. A good practice is to slow things down to begin with and over emphasize balance and stability first. Unless you’re properly grounded, it’s tough to control a swing with any power.