Start by clicking Login in the top right corner.
Once at the login page, at the bottom there's a Create an Account section. Hit the Membership Information and Membership Request button. There's a button at the top of the page to take you to a video if you get stuck.
You can use your email address as a username, or your name. Use a . instead of a space in your username.
Once you have filled that out we'll approve your membership as soon as you have paid, however most content here can be viewed by anyone, approved or not.