Grossly underrated, your camera’s Program (P) mode effectively gives both aperture and shutter speed priority in one semi-automated package. If you want a wide aperture, simply ‘shift’ the Program to get it. You want a slower shutter speed? Then shift in the opposite direction.
Questions to ask your wedding photographer include these: How long have you been working as a wedding photographer? Will we receive digital copies of all images? Is there an extra fee?