If you don't, then go to a larger dealer. It is considered highly sleazy to tie up a salesman's time at a larger dealer and then go buy the same gun from a discounter. If you use the dealer's services, pay for them or else he may not be around to help you next time. I have an extensive write-up of the four rules of gun safety as promulgated by Jeff Cooper, who perhaps more than anyone else invented combat handgun training in the United States. Safety is your foremost consideration when purchasing, owning, and using guns.
Safety is the sole responsibility of the owner.
It's a wetware issue, not a hardware issue. NRA's Basic Pistol course is a good place to start getting acquainted with guns and shooting. NRA's Home Firearms Safety is another good course. When you practice, wear hearing and eye protection. An ejected brass casing from a semiauto can rebound off the wall of a port at an indoor or outdoor range and land on your head or strike you in the eye.