This universe has a civilization of humans! And some other things. It's not crowded in the way Edda is but it's not just the one planet either. The humans might be easiest to start with. They're on that planet over there, it's not Earth but it has very Earthlike conditions and bronze-age humans living in cities and villages dotted across two large continents. Depending on how thoroughly any prospective visitors look they might find other things before visiting.
That tickles something in his head but he dismisses it for the moment. "You're supposed to have someone else introduce you, or mention your name offhand in a way that it can be heard. To show that you are welcome and not a stranger. We call ourselves the Water People or the Lake People, I don't know what outsiders call us. If you have a map I can point out the region."
"Fairly rare ones, perhaps one in a large city with some skill and one in a dozen of those as practiced as I. I am a spirit-talker, a shaman-"
He goes over the basics again: Talking to spirits and animals (though that's harder), doing little rituals to calm or influence them, banishing ghosts, minor and slightly less minor blessings with more little rituals, minor earth/water/air/fire manipulation, petty illusions, object reading, an intuition to peoples' alignment on the four metaphorical conceptbundles of the elements, his body is magically reinforced and heals faster (that's probably not useful, he's mentioning it just to be thorough)-
"And with time I can develop new skills that have a decent metaphorical link to one of the elements. I developed object-reading this way through a metaphor with water. Oh, and I have no information on whether offworlders are capable of learning this, but I can teach it. Usually it's an apprenticeship but mostly for lack of good candidates, I'm not attached to doing it that way."
He stops to carefully think for a long moment before answering. "I don't want to overpromise. Assuming a few good candidates who are really trying and put a day or two of solid effort per week in - not all in one block - a week at the earliest for it to become clear whether it's possible at all. If there's no signs at all after three months, I'd call it hopeless. I'll be able to tell if they're making progress before any students do. Getting to useful results would take longer, I want to say six months to a year to be able to find and start talking to the most cooperative spirits? With no guarantees that any particular person has the right aptitude."
"Hmm... Ideally I'd screen some folks who think they might fit for the length of a conversation, then an hour long group intro session, and then pick up to a dozen promising sorts and schedule them across from each other. I'm not sure how many I should screen, how much volunteering pre-screens them as it were."