First thing, crashes are nowhere near as bad as they 1) sound and 2) look. Main thing if you going to crash is give to the kite. That is, push both arms out towards the kite, take a couple of steps towards the kite or both. This takes the wind pressure out of the sails and takes the power with it. When I first flew my EXP, that first crash I thought "that's it I've stuffed it" but it and I survived.
Handles: The longer the handle the more amplification your hand movements have on the kite. Think the greater arc of a circle. Rev handles are measured by the length of the rod used NOT the length between the tips. Most common on 1.5's is 13". Smaller handles for the "faster kites" eg B2 and Speed series. Bigger handles for lighter winds.
Most pilots start off with a Standard, full sail, then a Vtd or full vented. This covers a huge wind range. A standard will go to 20 but that is very high and you risk stretching the sail. That's a one way street. My little B2 Std will do that range but it wouldn't be ideal as a first Rev.
Hope this helps.