Get synchronized with your upper and lower body moving as a unit. Smoothly decelerate the club once the ball is on its way. Your finish should only be slightly longer than your backswing. Hold your finish position until the ball lands on the green. It’s a good way to instill balance in your overall motion.
The high soft shot requires that you swing the club with your hands wrists arms and lower body all accelerating in smooth unison. Look at my positioning in the middle photo: The club and my hands are in front of my chest and the shaft and my left arm form a straight line.
Most amateurs spend a big chunk of their practice time on dead-flat practice-range tees. They seldom practice from long greenside rough sand bunkers side-slopes or uphill and downhill lies. And I understand that. Why practice from difficult lies when you can’t even hit good shots from good lies?