As someone has said, use a downloadable PC trainer to get a grasp of the basics if there are no classes being run. I taught myself IFR GPS skills using the manual, a trainer tool and an hour or two in the air (in a place without ground courses etc), so it can't be hard...
For Supplemental VFR use it should be enough to a) know when the unit is giving faulty information, and b) know how use Direct To & the Nearest functions. If you're not using it as primary means, that's enough to start with.
Good luck.
Last edited by Oktas8; 23rd Nov 2012 at 09:34.