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
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.
Tiger's set up is great to copy, he is braced to the earth, in perfect position and balance, and ready to deliver a solid golf swing