For Drivers, long irons and hybrids, we usually simply say, ball in the front of your stance. Not everyone will be the same but basically if you set up to the ball with your feet together and the ball between your big toes, now take a small step wider with the target side foot and a big step wider with the trail side foot you should be in good shape.
You’ll want to have your feet about shoulder width apart. With the driver have the insides of the feet about even with the outside of the shoulders and a bit narrower for the long irons and hybrids.
Now let it rip!