Step one: install element from here (link is "https://element.io/en/download").

Step two: At the "account creation screen," be sure to click "Edit".

Step three: In the "other homeserver" bar, type (or paste) "matrix.aliceficialintelligence.com".

Step four: Settle on a username and a password. (You'll choose a display name later which can have capital letters, so don't worry about them for now.)
Step five: You're done