That will happen quite a bit. Face skin is usually the last detail I have to fix before I continue on, don't worry, it's normal.
As long as the rest of the body is consistently the same color, it will make it easier to match up the face.
I think a hi-res skin pack is in the modding starter kit, it'll help immensely, until you can dump and make your own.
Use every resource at your disposal to continue to learn and improve, because the end result is definitely worth it. :toast: