This is a great shot to practice because it is a mini version of the full swing. Make sure to finish near your front pocket and practice distance control by taking your backswing up to your pocket, chest or shoulder height.
Eliminate the term weight shift. It is actually a move to the back leg and then a shift to the front leg. This allows for natural head movement and body rotation
Timing is everything in the golf swing, practice the proper wrist release to increase your power