Best way to teach a friend the basics?

[Wora]

Another option is to simply observe them as a ghost (i.e. you observe the round, find them, and observe them throughout the round), in which case I personally would have no objections to giving mechanical help via some private voice chat (obvious exception: any information gleaned from deadchat), and usual mentor-like guidelines of trying to avoid steering them - tell them how to do something, not what to do.

I didn't even think of that, that's a really good idea!

And yeah, I'd ask the admins beforehand and, if I'd play with them, uncheck any antag roles, just in case.
Thanks for the reply!