Hi !! just some simple tips for unhooking..
1. Practice flying your kite unhooked on the sand but do not fly it through the powerzone as it has a super strong pull and is near impossible to hold onto the kite....for me anyway.
2. When using a leash i would recomend attatching a suicide leash to your fifth line for starters so if you let go of the bar while unhooked the kite will immediately depower.
3. Firstly just ride along like normal then unhook but continue to ride along normally, keep the same stance as you would if you were hooked in. It is very important to do thid before trying tricks so you know how it all feels to be unhooked.
4. The first thing to practice would be simply popping of the water, not throwing yourself into a trick, just edge hard into the wind, when you feel you can no longer edge(dont edge to hard as you will lose all speed) simply release that edge and kick off your back foot and you pop into the air, wont be huge, only small for starters. Just keep doing that until you land that nearly 100% of the time.
5. Once you can do that try some simple tricks like, raleys, backrolls, just simple things like that.
ONE THING TO REMEMBER !!! - keep you bar close to you body so you dont get sore forearms and most importantly so will lessen the chance of pulling any muscles or injuring yourself. It will also help doing your tricks !!
hope this helps. if you need to know anything else just chuck up a post any someone will answer your questions !!
GOOD LUCK

JLxx