I have started a community and used discord. I had someone else set up the discord channel at the time but with this article I could have easily done it myself (it was nice to have help at the time though). I am more in charge of the promotion and you have got it right, I write posts and advertise the server and community. I also read the categorises relevant to my community and invite people when I comment on their post.

Rules must be obeyed! We are just starting to have to reprimand members for breaking the rules. It is a gentle approach at the moment but I can see we will have to get harsh as the community gets bigger. I am seeing members 'regulating' on our behalf now which is useful.