Welcome!
Also, tbh if you make a new community for something you want to see, and post to it maybe once every couple days, your people will eventually find it.
It takes a bit of upfront work to prime the pump, but eventually you'll find a steady little stream of posts just start to appear.
It almost feels like it's addressed to you when it happens, like oh! Someone posted in my community! And it's something new to me! It's a real treat.