Re: What if I get that call?
I'm a newbie so can't post links. Google "Start Sailing Now". That site has very good info for getting started, including how to dress.
Don't forget the beer, or cookies, or Gatorade. Something tasty to share.
A good pair of fingertip-less gloves are one of the best purchases I made for crewing.
Be on time. No, be early! You can help get the boat ready and meet the other crew.
I started sailing by showing up on the dock on race evening and asking around if anyone was short-handed. After bouncing between a few boats over the next several weeks, I finally settled in with a J/30. I've been sailing with them going on three years now.