kubus3321
There really is not easy guide, best you can do is find the example mod.txt (Should be somewhere here: Program Files\Cosmoteer\Standard Mods\example_mod)
In here it will give you a basic understanding of what is what. Of course you can also look at other mods and see how they do things, this helps me from time to time, but you can also always ask for further help on the Cosmoteer Discord