Interior wall holes?

Go to hardware store or lumber yard where they sell paneling, You should find puddy filler sticks in different colors, blond, browns, white, etc that is used to fill in over nails and staples. Sort of like a wax crayon. Been around for decades.

Some of the holes can be fixed by rubbing the handle end of a plastic screwdriver over the hole. If you look close, most if not all of the holes are pulled out, like a volcano. the plastic handle will allow you to push them back in, and cover the hole. It will also make the paneling smooth, even if you use a putty stick.

I have successfully filled the hole first by pushing the wall paper covering in with the handle end of a screwdriver as indicated above. I then take a dab of latex caulk (white, antique white, or almond depending on Wall color) and then smooth over with finger. This usually hides the holes fairly well.