Dark souls nito model help

I’ve been trying to get the textures on to the nito model and then put it as a .nif for a skyrim mod(mostly wanting to make it as a armor so I can be nito), but I have no idea on how to do this in blender along with how one get it as a .nif file. I’ve watched some videos, but I am still lost on this whole thing, so can anyone help me?

Note: This is my first time trying to do something like this.