Don''''t know much
what you need, if your serious, is to first do some day sailing, then crew on some coastal runs, and then convince some people to let you crew on their boat. Remember, be honest. Alot of people would rather teach a beginner, then deal with someone who knows what they''re doing (or thinks they do) but doesnt do it the same way the guy who owns the boat does.
And yes, you need a passport.