also check out your local Coast Guard Aux sites.
They run many courses out of our local West Marine down here and are a great resource. Courses range from boater safety to navigation and electronics.
Also good bunch of people to get to know, especially on things like Safety inspections (,if you are new on the water.)
Plus get to meet other at the courses with similar interests.
Must admit, I was the only RIB owner, on the ones I took
(west marine themselves ,run some useful, free courses and usually have brochures at the checkout on upcoming events)