Don't think too much about changing your edge. Concentrate on 1) cutting out wide 2) building a lot of speed into the wake 3) letting go with your rear hand and squaring up at the very last moment - just before you ride up the wake 4) jumping straight up by extending your legs 5) just tilting - not throwing!! - your head backwards 6) landing it with a big grin.
!!! Your take off shold feel like someone pulling your legs away from underneath you, a strange feel of tripping. You should get awesome pop which shoots you up high in the air. The rotation should be nice and slow. Good look !!!