Heading for driving school

Which school will you attend?
Get all the endorsements.
How old are you? There is no maximum age to be a trucker, but there are minimum ages.

 

Just be calm. It's nerve racking the first time you get in one of these things. They are loud and it's hard to see out of. Of course all of that is just because you are used to driving a car. Trucks actually have great visibility, you just need to learn how to use it. Shifting will be hard and you may feel like you will never get it but you will, just be calm when you miss a gear.

 

And get every endorsement you can.

 

I think AIT pushes Werner real hard. There's a dozen other choices available. What type trucking do you want?

 

Werner owns AIT. They bought the school a couple years ago.
Anyway, you'll figure out what you want after the externship. Lots of good jobs for Phoenix drivers, from long haul, local, milk tankers, LTL, etc. @ethos gave excellent advice, "get all the endorsements."
Here's one example:

Family owned and operated since 1976, Mountain Valley Express is California's premier LTL trucking company. We have an opportunity for transportation professionals to join our award winning team! We have grown to 9 terminals throughout California, Nevada and Arizona. Our company is currently hiring LTL Drivers!
We offer competitive wages as well as an excellent benefits package!
Yearlong/Full-time Class A Drivers
No experience needed, we'll train current Class A Drivers
You're home every day with weekends off
Hazmat and Doubles Endorsements preferred
Short reverse commute
Position: LTL Driver - Phoenix terminal

 

Roehl Transport flatbed has regional.
Titan Transfer - dry van
Freymiller - new cdl grad OR 6 mos. experience. Refrigerated trucking.
Watkins-Shepard - dry van
Navajo Express - OTR & regional refrigerated & dry van
Danny Herman Trucking - no northeast runs. Dry van.
Butler Transport - refrigerated
Dynamic Transit - refrigerated
East-West Inc. (www.goeastwestinc.com) - dry van
Abilene Motor Express - dry van & some refrigerated
Eagle KMC Transportation - dry van
(I'd look closely at companies that provide APU in the trucks. APU is "Auxillary Power Unit" which is used when the truck engine is shut off. APU gives you air conditioning, heat, electrical power for refrigerator, computer, cooking, television, etc. Some provide Direct TV and satellite radio.)