I have to say i don't know anything about the Reunebound world but i'm excited to learn about it with this game.
It's like this fantasy world that that has a big kingdom of noble humans, elves that are good and live in forests, dwarves that are indifferent and live in the mountains, skellingtons that are bad and demon barbarian people that are - wait for it - also bad. There's also some dragons that like to f stuff up occasionally. I'm not sure there's much to learn beyond that.
You forgot about the troublesome goblins