Read as much as you can( I'm sure you are). Try to find a basic sailing class. Then go from there. There is a "need crew" section here at Cruisers Forum. Also try the destination
page for your area, the folks posting
, who are sailing in the areas you are near, might have some good advise.
Be careful not to just hop on any boat, get basic boating
skills, read about safety
aboard boats, make sure your boat is safe and captain
Good luck, happy adventure