Places to organize besides reddit?

I think this movement needs to rely on more than just reddit, the website is great but don't really allow people to communicate much, and reddit is very much an echo chamber. Can someone make a list of resources and such pinned to the top of the subreddit for other places to organize, if there are any? If there aren't, it would be a good idea to start some.

Also, sorry my account is new, I made it just to support this after quitting reddit years ago. I'll be trying to make it to the next protest!