Hi there, ZDR! First, it's great to hear you've been considering submitting for issue 200. Whether it works out or it doesn't, we appreciate you making an attempt!
I'd advise you to PM me and/or WT with your idea, and what you have so far. We might be able to help you tighten up what you're writing and get it to a manageable size where you can finish it in the remaining time! Or maybe it's already at a good size, but we can discuss a good way to chunk up the work, building a schedule or dividing it up into a few work sessions.
It's hard to say, in general terms, what the best path forward is, but if you send us some more information, we'll give you a hand!