You do a lot of fidgeting with your feet when you’re down on the shot like you’re not only checking your arm but trying to find the shot line.
Stand up behind the CB and find the shot line first , step a little to the inside of it with your right foot and then step into the shot with your left foot at about a 45 degree angle from the shot line as you slide the cue into position behind the CB with your chin going down to cue.
Comfortable? Body in the way? You can adjust your right foot, toe in/toe out, step on shot line if you want to until you’re comfy and alignment is good.
Now remember where your right foot is in relation to the shot line and do that every time.
If you use the shot line as a reference, making sure your forearm is perpendicular to floor when cue tip is at ball, and you’re comfortable your arm, shoulder and everything else hanging off the body will take care of itself and you can focus on the shot.
Everyone is built differently and their feet may not line up like yours but you need a reference point to be consistent and to stop all that dancing


