Lol, nah I didn't say 33 was too old to hit it big, I said given time, you will start to feel it. 40 is generally where athletes begin to get anally raped by old age...
Lol, my dads 52 now and he's def feeling the old age rape of his bones, though he used to be a hockey player for like all of his life and then a coach, and now he's realizing that fatigue sucks haha.
The other thing was that when u introduced ur topic, u made it sound like u could hit 3's on some probably smaller jumps, and u said u were just barely getting into freestyle. U also didn't mention ur back-country and probably cliff-dropping background, which changes a lot, cuz u would be far more used to the airtime and adrenaline of jump-like surfaces.
My suggestion again is to look for like Line Traveling Circus on google,  check out andreas hatviet's trick tips (all of them) look for other trick tips, and then if ur worried about falling, then find either friends with a tramp, or a place with trampolines and lots of mats (a gymnastics place?) and practice spins, flips and other shit.
If u want double backs. fronts, rodeo 540/10's or Misty 540-1080, find a place with a foam pit (again gymnastics place) and start off small then go bigger and bigger and bigger...
Also i don't know where u can post videos on here but if u link some videos in a message to me, I'll give u advice on the jumps, rotations, and styling the tricks when u want to.
So I guess just remember that speed checks are incredible, then ur arms are ur best friend for rotations, and sometimes its better dance like a monkey and look odd than to get hurt.