Its a very achievable dream Gabriel. Crewing
is a great way to start. See if your university has a sailing club or if there is one near by. Even if you start to sail on dinghies you will be well on your way. The dinghy
principals are the same as those on a maxi
yacht. Plus they are more fun and you will get a better feel of boat handling much faster.
Get a copy of sailing for dummies. Its a good learners book regardless of the commercialism that surrounds the Dummies series.
Either way, just keep chasing it. See you out there