How to Put Backspin on a Golf Ball
Use a short iron or wedge. It is difficult for most amateurs to get enough height on the ball, which is a requisite for backing up the ball. For that reason, you should not try to impart backspin on shots with clubs longer than a seven iron.
Start practicing this shot with a lob wedge. It will give you confidence as you hit longer shots later. Position the golf ball more toward your back foot, rather than in the center of your stance as you would on a regular shot. That will force you to hit down on the ball, which will create backspin. Swing down hard and hit the ball first, taking a divot in front of it after the ball is struck.