idk what you mean, if you want to learn how to script missions or stuff like that there are a lots of posts on moddb for it
you can mod and add a lot of things to the game, is very frindly on that end, but on the other end the game is unstable af, it can and it will crash for no good reason. avoid the campaign if you can its also broken af, just stick with the battle scenarios that have been modded in