When I put an older villager next to a kid to try and start teaching the older villager's action says that they are embracing & then I see a message that says "This villager is still too young". Why is that? Am I missing some secret on how to get an adult to teach the children?

It usually works better with a trainee parent, and are you sure the "older" villager isn't under 19? The teaching should work with villagers older than 19

Have parent checked, and it can actually workwith adults asyoung as 18.

I find have a master parent or adept parent they will teach them straight away near enough. I don't know if that is true but that is what i have found out...