Boat should be the last thing. First make friends that own boats, sail for few weeks and see if you like it. Boat is a prison cell
or paradise depending on the crew more than anything else. There are always boats that look for crew members for certain legs. I had a friend who was begging me to cross Atlantic with him couple of times - now I wish I did it. Next year I should be in his shoes - that's why I am doing website for my boat and will make it popular among friends and friends of friends - to make sure I am not drinking morning coffe to a mirror.