Marine Technician question?

There's a lot of differences between Automotive and Marine work. Cars are mostly metal and only a hand full of cars that use fibergl or carbon fiber. Don't know where you are, but you'll need to contact schools like UTI (Universal Technical Institute), WyoTech, or Marine Mechanics Institute for schools closer to your home. You don't have to have diesel, but it is a nice addition to the gasoline courses they offer.