I've never had to take my Mac anywhere to get it fixed, but I do know if you have a local Apple store, they do offer "free" lessons on Mac basics and basic repair stuff for Mac's.
I say "free" b/c this is what my friend has said, but I, personally, don't know if its true or not.
Conversely you could go for a Mac Technician certification, but I'm pretty sure they charge for that.
When in doubt, Apple forums are sometimes helpful.