Pokémon Model Ripping Project

[LilyValley807]

I don't have much knowledge about ripping from Sun/Moon, and I think at least part of my post pertains to this, but I don't know if my other question(s) are best put here or somewhere else. So I do have multiple questions, but first off is actual ripping. I wanted to make Cosmog appear in Blender properly, but the stars it uses in the texture are dynamic, it appears. I saw an older post that helps to explain how to get the textures to look as they should in 3D software, but I didn't get the info I need to make eyes and mouths work, nor did I get all the info on how to fix the texture in an imaging program.. I do not have access to Photoshop so if I could find an explanation for Paint.net (GIMP and Windows Paint work too) that would be fantastic.

Next, I dunno if this would be better off being asked elsewhere, but anyways... I downloaded the already posted Solgaleo and Lunala models, but some of the textures just do not display right. The textures that I need to appear are either very dark/can't be found or are within multiple layers of meshes. Here is what I'm talking about:

I haven't seen the eyes, either. So I have a vague rundown of what to do with ripping currently, but in Ohana3DS, just the preview, it's quite a mess:

The eyes are backwards, the default mouth isn't used and the wings just... don't look like they are mapped right.

So, I would be happy to know if anyone has an answer or advice for the question(s).