The suggestion to try and join a
racing boat is good
advice, it's a common way to get some quick practical knowledge about the mechanics of sailing and, if you're lucky, the chance to learn about some of the many other aspects of sailing. A lot of places this will mean joining the yacht club at some level, even if not as a full
member, as there are costs and liabilities associated with racing and most skippers and clubs want to have some basic agreement in place if you are going to sail with them.
You got an offer from another poster to join them in a beautiful part of the world for two weeks of adventure, which is pretty good for a random post on an
internet forum.
Something not mentioned yet is taking a sailing course such as
ASA, RYA or Cansail. A beginner 'Competent Crew' course will give you the basics that will make it much more likely you can get on as crew with someone actually going somewhere. Sailing schools abound all over the world. Personally I would (and did) travel somewhere else to take a course, just because it is interesting.
Deliveries are a great way to get sea miles, experience, and learn whether long distance sailing is really what you want to do. Boats are being delivered all over the world all the time. Most companies have room for unpaid crew. If you are willing to get to and from the boat, they will feed you and use you on the
passage. Professor
Google is the best way to find more info, followed by contacting them directly and asking straight out 'What do I need to do to be able to crew for you?'. This is what I did, it was a good experience and taught me a lot.
There are online communities specifically created for finding crew... Crewseekers for example. Again,
Google will provide.
Or you could just go buy your own boat and start sailing, like so many do. For someone who is as confident in their abilities as you seem to be it may be a better choice than
learning through and with others. No doubt you can see the significant risks and costs associated with this option, but for some it is very appealing. Even just starting with
dinghy sailing will teach you a huge amount very quickly, and may be very satisfying for a quick learner.
Good luck, you'll find all sorts out on the
water, including people just like you.