Heya. There’s not really any guides out there that teaches you how to mod Stonehearth, though there are some other threads here in the discourse that have asked similar to what you want to know. I’d suggest that you check them out and what answers are available there. 
http://discourse.stonehearth.net/t/teach-me-to-mod-blush/14144
http://discourse.stonehearth.net/t/teach-me-how-to-smod/21138
http://discourse.stonehearth.net/t/how-to-start-modding/21814