Ok, from the heart here, don't write a novel. Not now.
When I'm depressed, and I try to do something monumental or new, and I fail, it just makes me feel worse. What does help is doing smaller and/or more familiar things well. Maybe write some original short stories, maybe a couple of new video scripts (hint hint๐)...baby steps, ghostie. Accomplish a few smaller things, and feel better about yourself first.