Signing up for early access is as simple as providing your email address at the sign-up page. When you submit your email address you will receive a confirmation screen to confirm your registration.
If you do see the confirmation screen, you may want to try another browser, or deleting your browser cookies and clearing your cache and restarting your browser and trying again. You should also receive a confirmation email to the email that you registered with. Be sure and check those spam and junk folders and mark the email as not spam so you can receive future emails.