Air brakes (assume that is what yours has-- please confirm) DO feel quite a lot different than hydraulic brakes. Not better or worse, just different. And, yes they will take more effort than the vacuum boosted hydraulic brakes in your car.
They are also used differently than hydraulic brakes. For example you do NOT pump them.
You really should both learn how air brakes work and about their "care and feeding". Be safe out there.
I do not know about Arizona, but in many states, if the GVWR is over 26,000 pounds they require a special drivers license. And the written test will have questions about air brakes.