How to make pizza that has a fat outer rim?
If by crust you mean a raised lip, simply pinch/push the edge up all the way around. Leaving the edge free of sauce won't make it rise a great deal more than the rest of the pizza.

Another way to get a lip is to first make a round, hemispherical mound of dough, like a D on its side. Form your hands into a circle and push them into the dough so you have a ring of dough surrounding a central mound, with a little dip in between the two. This ring is your crust.

Finally, push the pizza into shape, spreading the central mound of dough out to form the base, leaving the outer ring/crust in place.