learn on cat tracks and then on the roll of jumps. start by popping a little bit into a 180 and put all the pressure on your tip while still looking around your shoulder and kinda just pop of the lip and come back around. once you get them that way its not too hard
Get up on your leading edge, (spinning right, get up in right edges) then butter. Start to put your weight onto tips at 180. Then look around to spot your landing. It's a pretty easy trick once you get it