SparkleArts

I want to make a Mod that adds new Soldier Classes for the Long War Mod, but I don't know where I should start. Really I searched the Internet and I didn't found any Information which Tools I needed, which Files I need to look at etc. to add a new Soldier Class... This is annoying as hell not to find any Information. XCom 2 is in Modding far more easier -_-