Basically The easiest way to learn an air trick is on a trampoline or using foam and resi ramps which I do!#)

All You have to do is remove your frames and just put your boot on then you can get a feel for landing flips etc with the weight of your skate.

trampolines are very cheap in most stores atm so if you want to advance in skating either buy one or get on down to adrenaline alley (my local) it has a foam pit and a 14ft roll in to resi ramp!