If you can already throw flatwater ends, then it should be an easy adjustment.
When throwing flatwater cartwheels (assuming you are doing it correctly) the paddle rests flat on the surface of the water (both blades touching, shaft parrallel to water surface). In other words, your knuckles are touching the water.
If you want to initiate (sp?, whatever) into a bow stall before throwing any ends (the easiest), then on the second half of the double pump, bury the paddle so that the water level is at your wrists, still keeping the paddle flat, i.e. parrallel to the surface of the water, just submerged. This will position your body into a forward position easier than throwing regular ends ever will, and will make it easier to get your first bow stalls. Plus, the paddle is already underwater, so you can pull up on the blades to bring the boat to vert immediately, making it possible to find the point where you balance the easiest in your boat. Every boat is different, and since your boat is shorter and more bouyant than most it will be harder (easy boats are longer and slicey, like EZG's, S6F, Dominatrix, etc).
Disclaimer: I've never heard of anyone else teaching this, but just kind of figured it out/noticed it a few years ago. Take it for what you will. If it works let me know, otherwise tell me to f-off.