I admit that I have no idea how to mod in Stonehearth, I just use other people’s mods.
Having said that I wanted to throw out the idea of a Bard Class.
I imagine that it could be similar to that of a cleric and be a support in combat by buffing hearthlings.
Alternatively you could busk in your town and merchants / adventurers could give tips when they visit.
Honestly I would just like to see a hearthling play an instrument.
There have been similar posts in the past that offer more bard-related ideas, however they were a few years ago.