Set up with your clubface open to one o'clock, play the ball forward, set your shaft neutral with the clubface, balance your weight evenly on your feet, and get the handle towards your left leg so you finish around on an arc.
Hitting the ball fat tends to come from either falling backward on your backswing or overusing your hands and uncocking your wrists too early
Allow the sweep of the club to naturally hinge your wrist for you during your backswing