Joining the server will not get you access to a Frontier server, don't join expecting to play anytime soon.
The channel #future-of-frontier should be read upon joining. Read everything before asking any questions.
The invite link has a fixed number of uses, if it's expired you can try again later.
Don't share the discord link to people directly. Don't join if you're just going to leave when you don't get to play a video game.
This does not redirect. Read the page and then, click on what you should do on joining.