You have no idea how heavy an unfinished manuscript draft, long or short, can weigh on you. The first draft especially. This is probably my most often given advise: Finish it.
Just spit it out there. Good, Bad, or Ugly. As long as the last word of that draft is done, even if it devolves into nothing but an outline at the end.
I’ve said before to celebrate the milestones. And this is a big one. Suddenly it’s out of your head. The weight’s off your shoulders. You can breathe easy again. And you definitely deserve that!