go to
http://kiteforum.com/
and look around.
It is a great sport, this one is addictive too, not that hard to learn if motivated and have good steady wind.
Kite size will depend on your weight.
Men, women, and kids can all learn, it is no more challenging than windsurfing or any similar sport.
Take a lesson from a knowledgable instructor.
Don't hurt anyone on the beach !!!