WIP 1
Use the burn tool at size 1.0 to make whiskers for the facial hair and then use the smudge tool on it to make it look more realistic. The lips are kind of a dull color, my suggestion is simply use the free select tool to select it and then make it a bit more saturated (Whatever makes it look more lush.). Adding wrinkles would also help, though I don't know if you're going for the old man look or not. BTW what program did you use to make this?