As a Member of Lagoon Owner's Club, you will receive some free online courses via NauticEd. I would also recommend enrolling them in an ASA (American Sailing Asc.) course at a local marina for some hands on in water training and classroom training. Their textbooks are good too. You might consider complimenting this by hiring an instructor skipper for a day or two in BVI.

My instructor skipper a few years ago was Julian Putley, of the Drinking Man's Guide to the BVI fame. He was very good and very interesting. I would ask for him.

Cheers,

Tony