Funny thing is, my Grandfather was a Master Machinist for Greenlee - Remember the joke about the specialist who came in, turned one screw and billed $10k? - He DID that... He had retired and they kept calling him back in to setup machinery, no one else knew how...
So I kinda learned what I know through osmosis.... I keep wondering what I could learn in a class.
Farmingdale College used to have Machine Too Lab, part of their MET program [mechanical engineering technology].
I learned working summers while in high school & college in the 70's. All manual machining. The guy who taught me, VIC, looked like he came right out of American Graffiti but was willing teach "the kid" for which I am truly grateful.