If no, what should I do

Sure, I don't see why not!
There's just 2 rules: You gotta be a Terraria fan or are familiar with the game at least, and have fun!

What is the address?

?

I mean how do I join. I never played multiplayer before

Oh, I thought you were talking about the stream-

No, I was talking about the server

Oh, well I don't know then. You might have to talk to the other stream mod, because I'm pretty sure they're the one who made the server.

ok

Ohh that's why you asked.

I can't do online stuff for IRL reasons, I didn't even know there was a server

Who do I ask then?

Idk