@audreycoadarme I'm lucky to have fans, of course I'll talk to them! and thanks for letting me know which stories you are reading! :)
i'm not sure why you need a story group. I normally just go to a chapter of the story, then on the right side is your cover. Hover over it and it should have the option saying "change cover." When you click on it, it has three buttons. Create Upload and Remove. Just click upload and choose the picture from your files. I hope that helped!