Look for a nice smooth and sloping wave. At first, choose a wave not too steep. Charge on a beam reach just downwind of the wave to gather tons of speed.
Unhook and rake the sail back, slightly over-sheeting, to cause the board to head upwind into the meat of the wave. You are also getting on your heels.
As you near the top of the wave, lay the sail down (horizontal to the water) and back like a lay down jibe but keep your body rigid (especially your upper body) and leaning out and forward over the wave.
As you kick off the wave then throw your whole body forward and out over the sail. This should be exaggerated and you must totally commit. The front arm should be extended and stiff. This is the critical section of the maneuver that will make or break the move.
While laid-out (horizontal) over the sail, push out with your back hand like you are trying to stick the clew into the water. This will present more sail area to the apparent wind and is usually the only action necessary at this point. However, if the wind is weak or you are moving slow then you may have to pull-up with your front hand and turn your upper body windward.
The apparent wind will cause your rig to swing vertical. It's all about the apparent wind and you learning to trust this phenomenon. When you trust then you commit.
Eventually you will return vertical and preferably landing off the wind so you can plane out of this move. Start off with tail landings but then learn to land nose first.
The landing is smooth like a good jump.
Sheet in and sail away Was that fun or what?