hey there ...
the airblast is a high-performance-kite -> and not really made for beginners, so you might experience a lil harder time while learning but will have a good kite when ur done
if the kite lies downwind, fronttube up, you can pull the depowerlines and 'pump' it out of the water.
if it lies fronttube down, and you got strong winds, just pull the depowerlines hard and let go - this will flip the kite on its back.
now just pull one line (outer lines of the bar) about 2-3m to you (attention not to wrap it around you). the kite starts traveling left (or right) and will start when it's in typical start-position.
this will result in less bodydragging than using the bridles ...
i'd remove them anyway, it gives you more feeling for the kite and the 8.4 is no problem to relaunch the way described.