RPG Visual Overhaul Modding

I need someone proficient in Blender and game modding. i am trying to become good at modding, in games like for example final fantasy 14, resident evil, skyrim etc. Currently my main focus is understanding how to make Final Fantasy mods work. So far i can: Get a model online, load it in blender, connect it on top of another mod project, and export it to the correct software used to make the final Final fantasy mod. this software is called textools. I can get the mod in there, but then comes the hard part: it has its own way of recognizing textures, so i have to bake the textures in some the correct format and export it and then somehow correctly place it on top of my model inside Textools.

Its just impossible to find any good guides on this, yet there are so many good mods out there....how do i get the knowledge? am hoping to find a teacher to help me, i feel like im so close....i can get a grey texture in my game, rigged and all but i just cant get it textured :(