I learned the Normal Pull-up passing from right to left first.
I think the clue and mistake many ppl do in the beginning when first learning the aerial HP is that they dont give themself enough time in the air, relax, do it on the way down.. you got the time
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Do a medium sized jump in normal powered conditions.
Let the kite lift you up, Wait until you have reached the top peak and on the way down "when the kite is floating, not pulling you up" do the pass.
If you do it while the kite is pulling you up you have to lift 3 times the weight compared to when you are just hanging under the kite.
When you are landing theese, start doing variations with rotation and passing the bar either way..
Or you could try the Flat 360, where you dont pull up at all but are just passing the bar behind you in a rotation of the wave, (or go off the wave toeside and pass the bar, easier but mor a flat 180.. )
I think its harder to do the flat HP if you havent done it behind a boat before..
On the pull-ups: Be sure to send your legs up, commit and be aggressive!
good luck