i tried two backflips this year. First time, didn't commit, somehow did a 180 in mid air, still came around, still alive. second one, committed, laid it out too much, caught my tips, still alive. just do it.
maybe my tip is try a rodeo first, they're way less scary, then when you're all hopped up on adrenaline from landing a rodeo, go for the backie. that's what i did.