Shoot it from a rest. When you press the trigger do so slowly--do not anticipate the "Bang". Let the shot surprise you. I've often told people that if you can say"now" as the shot fires, you're anticipating it and are likely jerking the trigger and pulling the gun down, anticipating the recoil.
Shooting free hand, I tell them "Watch the front sight, ignore the gun while you slowly press the trigger and let the shot surprise you". When you expect the recoil, you learn to flinch.
Many years ago as a newbie, when I got my first 1911, it consistently shot low for me. Got frustrated and handed it to my experienced shooter buddy and said "you try it". He then shot the X out of the bullseye target.