oh dam,sounds out of my league then!
Dont doubt yourself and keep practicing
Forget about the JL for now and just concentrate on each seperate element and have fun doing them
Remember the JL is just a combo of a bunch of singular tricks (backflip/turtle - then lazy susan - then a pull to Fade - then a lat roll) ...once you get better at each one...try to link just two of them (backflip to lazy etc) ...then progress to three...etc etc
Getting ready for the next input AS the kite finishes one trick is a good key to remember too
GL and keep practicing