If you have questions about any gun, the friendly range master will show you how to operate it. Start out on something simple like a Ruger 10/22, then move up to smaller 9mm handguns. Practice safety and accuracy. Take your time, most ranges usually dont like double tapping anyways. Bring lots of money, once you start, you wont be able to stop. If you have time, try a 12 gague shotgun. You'll be impressed. Bring a friend.
In the rare event the gun jams, and you are inexperienced, don't unjam it yourself. Put gun on safety, have your friend watch it while you get someone to help out. Injuries may lead to death.