It's amazing but many sailors were or are motorcyclists. Ask Around and you'll be amazed. Maybe it's a freedom thing or maybe it's that we don't mind spending some money on the good things in life.
As for starting in sailing, find a good training centre and take some winter courses in seamanship, sailing and
VHF. Stop by any marina or yacht club and the members will be more than happy to steer you towards a good course. Join a yacht club and stop by for a beer. Once they know you're a newbee they'll gladly help you with whatever you need, from boat buying to world cruising and everything in between. Ask about their racing program and offer to help crew on any boat that needs a hand. Racing is a fun social activity and you'll quickly learn from watching and helping.
Racing your own boat is the best way to learn how to sail her efficiently and effectively. Race courses are laid out to make you work hard for some of the turning marks, and doing so demands that you learn the boat. I still remember my first race that I wasn't last. Yahoo!