Since there are constantly new people joining @niceRO and information varies so much between wikis and guides (and it's easy to miss cohost posts or discord messages), I've created a wiki specifically for the server. Currently it's barebones (just information about how to sign up, use the client, and version differences), but I will be adding to it as I have time and learn more about the game myself.
Please feel free to contribute to it! This is a community wiki and I don't know anything about anything. Instructions for how to do so are on the contributing page.