Orcs Must Die! 2

Orcs Must Die! 2

Craft Your Own Spellbook
Modify and share your own Spellbook items like traps, trinkets, weapons, and character costumes. Create custom waves of enemies for Orcs Must Die! 2 fortresses. Read the Starter Guide for more information.
I want to make a mod
So community,

I would really like to make a mod for orcs must die 2. It would be my first ever mod of any sort, and as such I am unfamiliar as to where to begin. I have some knowledge of coding, but it is mediocre at best. I've checked the starter guide and have done all the basic stuff like downloaded the workshop tools, created the folders, etc. I'd aprreciate if anyone could give a link to a nice wiki or guide or provide some tips as to how to begin. Even if i could just find out what code the game is written in, I would have a starting point. Any ideas? Thanks in advance.