Tudy,

I'm assuming it has just a main. As Tim noted, it sounds like a vintage Hobie 14. Yes, you are right in that handling a main alone is the way to go for a single-handing beginner.

As for videos, I can highly recommend Rick White's "Total Boat Handling" as a good place to start. (It's the first in a series of five videos based on Rick White's Sailing Seminars.)

A book that I found helpful years ago was "Catamaran Sailing: From Start to Finish" by Phil Berman. Then, there's the favorite among many on this forum, "Catamaran Racing for the 90's" by Rick White and Mary Wells.