Hello, leedasol,
You must learn a bit of lua(pronounce "Looa", from the portuguese word for moon) and learn how to use the tpt api for lua. I've built a simple mod in lua that you can see here:
https://powdertoy.co.uk/Discussions/Thread/View.html?Thread=18530
Create a txt and program it.then you just need to rename the file as autorun.lua and execute the game to use your mod.
Sorry for the bad english, i'm Brazillian.
If you're a beginner at coding, I reccommend lua because it is simpler. However, you can't do as much as you can with C++ (From what I have heard, at least. I only know lua, not C++, so this is not from personal experience). There should be plenty of tutorials online, and the wiki has a page for the commands used in TPT.
Your mod is amazing, I've had it for a while.