Just click on the "Sign Up" or "Play Now" buttons and you will be taken to the sign up page.
At the Sign Up page, fill in your details and check the reCAPTCHA box (the only bots that we allow on our site are the bots we created for you to beat the Practice sessions).
And that's it! Your account has been created and you will be directed to the Lobby. You will receive a welcome email shortly thereafter.
Next suggested article: After I sign up, how do I fund my account?