Oh god, I almost forgot about this. Admittedly, I have 2 fanfics I could do. One of which technically has '2' chapters left, though those Chapters are split into 14, each of which could easily be over 5000 words. And the other one is planned to be definitely long enough to overreach 50,000 words, but I'm not as confident, and I've already written some of it. The problem with the other one is that I want to write that one on my own time.
So I have to make a new story. It's not original, it's technically a sequel to one Chapter of the first fanfic mentioned in this post. Let's hope this time, I don't get writer's block just as I reach about 20,000 words like I did the last two years.