You’d be best having someone who already knows how to drive stick do the test drive. Then they could tell you stuff you wouldn’t know, like if the clutch is slipping or if the synchro’s feel worn.
As for learning how, there’s not a lot to it other than get a basic understanding of what to do and then practice practice practice. It’s not really something that needs to be “taught.” You just need a sacrificial clutch. :lol: