Get the gmail app and there should be an option to make a new account, just fill it with random info and keep the login. Once you saved your current info for this AM account you can log out and make a new account with the new email

Ehhh… sometimes that depends. You can look it up for your device.

How do I make a new one? I don't have another existing one

No no no. You can also use an existing one. But you can also log out of your current. (Save your stuff) and make a new one or use an existing one.

How do I make another email? Do I just make one up?