You need to make a username and a password.
For your username, don’t use a real name. Choose a nickname that you will remember. Make sure to remember your username, if you forget it you will have to start all over again.
Make a password that has BIG and small letters and numbers (like BigPig1 or BiCyCLe7). You need to confirm your password, which means you’ll need to enter it again to show that you can remember it.