hitch ride from Florida to Cuba

[RavennaSailor]

hello.
I wonder whether anyone knows where in Florida is the best place/marina where to find boats going to Cuba. Perhaps European boats make a stopover in Florida (or Bahamas) before continuing. I'd like to 'hitch a ride' from Florida to Cuba. Obviously paying, and helping on the boat (oceangoing sailing license). I have a European Passport, so probably not a problem to 'trade with the enemy'. Thanks!