Try the #freewrite daily challenge by @mariannewest. It's fantastic to get you going when you can't think of anything or are blocked in your regular work.
I do this challenge a few times a week and get great results. She has a lot of good people taking part. See any of Marianne's "Freewrite Prompt" posts to check it out.
That will be fun, I tried Inktober too but failed, lol. Thank you for sharing!