Each hand plays a specific part in the golf swing, the left hand controls the clubface for slicing and hooking and the right hand controls the clubhead for high and low trajectories
To create consistent aim with every shot in golf start with a constant positioning of your left foot one clubhead behind the ball, then spread out your feet depending on the club you are using
There are two ways to practice the short game. First are how-to shots, where you learn how to control trajectory through set up and swing shape. Second are situational shots, where you move around the short game area and practice specific shots.