The position of the ball in your stance is determined by your swing shape and the club you are hitting. Your wedge should be near the center of your stance and your driver should be off your front heel.
There are several ways to grip the club but there are three constant pressure points that must be observed in order to generate power and keep your lag through the downswing
Learn to take a divot in front of the ball by finding the three bottoms of your swing, fat shots are caused by using too much back arm and results in a swing bottom behind the ball