For a start, don't take anything you read on any Internet forum (including this one) as Gospel.
Your best commercial source for Arizona's gun laws is the Arizona Gun Owner's Guide.
Since you are new to guns, you are the perfect student. Most males think they know everything about gun handling because they watch television, so it's not a good idea to let your buddies or family members show you how to shoot.
If you can afford it, go straight for a Gunsite or Front Sight defensive pistol class. The beauty of Front Sight is that you can pick up a certificate for their 4 day class on eBay for about $200.
If you can't afford that, there are plenty of NRA instructors in the area and most gun shops have firearms classes, and some rent guns. Chalres Heller (Tucson), one of AzCDL's directors is a CCW instructor and runs regular classes.
Since you live in Tucson, contact me offline at email@example.com. I spend a couple of afternoons a month volunteering as a line safety officer at one of the Pima County ranges. Most of my time there is spent helping people learn to shoot properly. I am an NRA instructor.