Ah, Yeah, the "Teach me how to play XXX" was more of just a filler idea. The primary reasons for this would be anything that could be auto-completed with a Duty Completion, or Quest Completion. However, to erase the prospect of the Quest requirements being fulfilled, but not being turned in by the requesting person as a means to try and circumvent the system, I would suggest it being tied to Quest/Duty requirements being fulfilled. Not by the Completion trigger. When a quest requirement turns to a Green checkmark is a good example.

I work in cybersecurity and am cautious by nature. I aim to look at all of the ways someone could take advantage of something like this so as to help snuff out those "vulnerabilities" and make it as desirable as possible.