I can‘t tell you what the courses are like, but can tell you what courses there are. Not including common to all trades courses:
EME Common (as the name implies, common to all maintainers)
QL3 - your basic wrench bending stuff (apprentice), several months in CFSEME, Borden.
QL 4 - on the job training
QL 5 - journeyman‘s trg at CFSEME
There is a move to Distributive Learning and breaking the courses into smaller blocks.