"tutorial" would mean "how to" use the game interface...
Learning how to sail would be something else.
Basically don't start out sailing in strong winds, and sail in a boat that has lots of stabillity and which is selfrighting so you do not go bathing all the time.
I suggest you sail with the Bavaria for starters.
You will also need to get out the manual so you know what buttons to klick. (pdf on the DVD/CD or in the games installation diectory.)
Then you may consider actually joining online races.. get clear of the course and
drop anchor so you don't get in anybodies way then see how others do first...
You should also consider installing teamspeak http://www.teamspeak.com
so you can communicate by voice,
and maybe ask some questions and have some things explained to you while on the water..
There are some regulars meeting up here http://vivarace.de/
or here https://www.facebook.com/groups/wffsailing/
Though some may forget now and then, we all started out the same way.....
Cya on the virtual waters.
"As far as I can remember, there aren't a lot of points of land or holidays named after people who sat at home and criticized Christopher Columbus."
(Paul Cayard, from the Pirates base, in an e-mail to race HQ. 25 Jan 2006 volvooceanrace.org)