You can make a Discord server by selecting the plus sign in the app's sidebar, and proceed to invite people, create channels, ...

You can make someone an admin on a Discord server you own to give them more permissions than a standard user.

Here's the thing: If you're looking for an easy solution to turn off AI, you won't find one, and that's because you can't in Meta apps. Imagine that. Instead, you'll need to be satisfied with muting, ...