One common problem I often see in golfer’s short game is trying to help the ball into the air. The lightweight nature of a wiffle ball combined with the fact that it is not an actual golf ball allows the golfer to relax.
Stabilize the lower body, experiment with moving pressure to the lead side (left side for RH golfers/right side for LH golfers) in varying percentages (60%, 70%, 80%), and let the club FALL down.
Once you get consistent results and effortless trajectory, use same technique with real golf balls.