You're not the first to ask for a Discord server, and I've thought about the idea as well.
What's keeping me from making one is well, I would post at about the same rate as I do on Twitter. (And probably just reposts from twitter.)
I would also need some help managing it. I can't do it all on my own.
Unless there's a lot more demand for a server (for some reason), I think just sticking to Twitter and Itch for my monthly updates is fine for now.