Hi Jeff
The rigid frames are only very slightly easier to learn, the flexis are a little higher so are more twitchy. The wing does hold you up more, but it accellerates you into trouble a lot more quickly if you are not used to the board. Therefore you need to be able to ride the board before you use the wing.
The way we teach new riders, on any board is as follows.
Find a very gentle slope and with the aid of another person, stand on the board and balance by holding the other persons shoulder. Ask that person to walk slowly until you feel comfortable enough to let go. Do NOT look at the front wheel - this will make you think you are going to fall off and you will !
Keep practicing this until you can let go after you just get moving.
After that you need to learn to launch yourself. (You may find it easier if you remove the front foot strap initially)
Insert your back foot whilst stationary, and perhaps whilst using a tree for stability, push off and practice positioning your front foot. Keep practicing this until your foot knows to go without thinking about it.
The key thing to remember with Dirtsurfers is that the faster you go, the more stable they are. Infact learning to start is the hardest part.
Once you have that, take a look at this link to see how to combine the start with a Kitewing.
http://www.wingsurfer.co.uk/generic/template.asp?ACT=nav&mID=204
Good Luck, let me know how you get on.
SWAT