Cool! Well if you've never been, probably the best thing is to go where they'll set you up with gear, teach you a thing or two, and watch over you. It isn't as easy as it looks, especially at the beginning. Even athletes and gymnasts have to work to learn it, so brace yourself to be a true beginner again!

I do have 2 suggestions for places to go for classes:

Otter Bar Lodge Kayak School
out in the boonies of northern California
totally organic off the grid awesome lodge
AND great instructors
AND a gorgeous river out the back door
http://www.otterbar.com/

also my alma mater
Nantahala Outdoor Center
cabins on the hill in North Carolina
great instruction, polished system
Appalachian trail and a lovely river out the back door
http://www.noc.com/noccom/outdoor-school/whitewater-kayaking-courses/

Here's a good list of some other schools. I don't know much about any of them:
http://www.paddling.net/schools/2.html