Hey! I saw you ask someone about covers and all you have to do is go into the "My Works" tab and find the story you want to add a cover for and click "edit" - it should be under the current cover - and the cover will come up with two green buttons, "upload" and "create".
Click on "upload" and it will open a documents browser where you can pick a file from your computer to use as a cover (:
If you need someone to create a cover for you I can give it a go, I've done a bit of cover designing for people on here (: