This is for a 'slab' style body, but if you want a figured top you would glue that on the blank before you start.

You use the back template to get the overall shape of the body and to locate the hole positions. A good way to locate the holes is by using a 1/4" Forstner bit in the hole, push down, and the spike will mark the location.

Then use the top plate for the pickups, neck pocket, etc.