Skill teacher

I don't know if anyone has asked this on here before, but I need help with one thing I was going to include in a game, I had the idea for someone to teach certain skills, either directly or by selling you scrolls, but I can't find a way for either one to work. If anyone can help, that'd be fantastic. Thank you in advance.

what exactly is your problem with that?
there is an event command to have an actor learn skilols, and you could either use that in an NPC event or as a common event attached to an item.

Both should be fairly straight forward to implement in the base engine. Guess it depends on whether you want the make the player travel to the NPC if they need to update their skills or if you're cool with them potentially buying skills that they might need later on upfront and holding onto them until they're needed.

I feel I should've been clearer about that. What I meant to add is that I want to have it so that if you use a scroll on an actor that has a certain class, it'll work, but not on any other class. I'm still probably stupid, but I thought I'd ask regardless.

OK, in that case the common event needs to be a bit more complex and longer, but it works the same way with added conditional branches.
you'll need to determine the target (the usual ways depending on what you do exactly), then for that actor check in a conditional branch if he is allowed to learn that skill (based on whatever you want), and then either learn the skill and delete the scroll, or show text "I don't understand this scroll" and do nothing.