re your sand question...
When hot launching, you'll lay the kite out perpendicular (90 degrees) to the wind direction, and sand the trailing edge to stop it moving or flipping. Once you've unwound your lines, you should be directly upwind of the kite, with the kite at 12 directly downwind. If you hook into the bar at this point and slowly tension the front lines by walking backwards, you should see the leading edge start to curl up towards you. The kite will slowly start to inflate at this time, depending on how confident you are you may wish to let it inflate a little, or you can continue to walk backwards and the kite will continue to curl towards you and eventually left off the ground.
At this point you do what Plummet has described re inflating.
The side launch works very well once the kite is inflated and you have stopped to have a break mid session. Assuming you've secured the kite by sanding the upwind wing tip, rest of kite is downwind you can easily relaunch by walking 45-60 degrees upwind and slowly curling the kite off the ground by tensioning the downwind lines first. Kite will nicely curl up towards you in a controlled fashion ready for you to steer to 12.
Once airborne, how had you planned on landing ?
You have a couple of options :
1. Safest option is to land with a helper at the side of the wind window. I find keeping the bar sheeted in helps control the kite and stops is flying too far forwards and then stalling.
2. You can flag to safety (from 12), and watch the whole thing fall in a heap downwind. You might get a few simple wraps or tangles in doing this.
3. Back stall from 12 by pulling the rear steering lines (Ozone has a strap) to stall the kite backwards through the wind window. If done controlled and slowly this is fine. if done badly, you risk powering the kite up as it reverses down and landing it too hard, or having the kite power up and hot launch you. You'll only do this once - scary. Keeping the tension on the back lines will ensure the kite won't take off one landed.
4. An alternative to 3. is to bring the kite down the side of the window like an assisted landing, but then back stalling from the 3 or 9 o'clock position. Done correctly the kite will fall back onto it's trailing edge and slide into the 12 o clock position downwind. I always seem to mess this up so don't do this too much, plus you need heaps of space.
Caution: having the kite fully inflated, at 12 dead downwind is a little dangerous. if you accidentally release the rear lines you'll experience a full power hot launch, which is not nice. I usually unhook at this point and then tie the kite off using my leash (via the back lines) to my buried board or car hitch or whatever.
Over the years Flysurfer have produced a number of useful tutorial vids which i have linked from my website
http://www.specialistkiteboarding.com/#!how-tos/c91a
These include self launching, landing, packing up and the different water relaunches.
good luck !
I've never launched a foil before. I just got a Chrono 15m. Wind was 13-14 knots or so. How hard could it be? I had watched Ozone's Chrono tips and tricks video, but the thing would not inflate for me? 
