Alt on different data center?

Hi guys. I recently discovered I have friends on a different server, and I would very much like to play with them. Unfortunately they are on the Aether data center, I'm on primal. That means I can't world visit them, so I'd have to make a new character. That's fine, nbd. I found at the login screen where I can see the data centers, but it isn't letting me change my selection. It just has the star next to Primal. Is there a way I can change it to Aether to create a character on their server? Maybe the solution is right in front of my face, but I've spent the last hour trying to figure it out womp womp. Thanks in advance!

Go back to the main menu and click on Data Center, underneath 'Start'.

the star will remain on your current data center, but the one you select should be highlighted a light green. it kind of blends in with the rest so hard to notice especially if you have poor vision. but clicking it and clicking the check mark should change your data center.

Yep, I was so dumb. I was expecting the star to change on the one i clicked on. orz Thank you! <3