This looks like a great opportunity to learn how to sail.
Here's what the Cal Sailing Club has to say:
Membership costs just $99 for 3 months ($89 for students and seniors) plus 2 hours volunteer work and there are no charges for lessons, equipment use, cruises, or other club activities.
Here's how they describe the beginner windsurfing lessons:
If you're completely new to sailing or windsurfing, you're in good company. Most CSC members have no sailing and windsurfing experience when they first join, and the club members who volunteer to teach can still remember being complete newbies.
Our lessons emphasize safety (Personal Flotation Devices must be worn), self reliance (rating tests include self rescue and anchoring/capsize recovery), and minimizing environmental impact (least possible use of motors, bottom paint, non-recyclables).