We have an in-progress guide here: Stonehearth's Modding Guide
Next time it will get updated with instructions for modeling and some important information about items.
If you can’t figure out how to mod with the guide, there’s still many threads in the #modding category with information.
and if even that doesnt help people here are usualy friendly 
hell i can do relatively complicated stuff now and i started two days ago XD
best tip i can give you that ISNT in the modding guide is copy all the .JSON files from your
C:\Program Files (x86)\Steam\steamapps\common\Stonehearth\mods folder into another easy to reach one, and rename the .json extentions to .zip this way you can sniff about in how stonhearth does things and you can reverse-engineer most all things that way. what cant be done can mostly be found here, or asked