Hm, this isn't quite right, but you got the gist of it. Should go like this:
1. Register with your email (yes, registration is one field)
2. Look for the confirmation email and follow the link (you'll be signed in automatically)
3. Enter your payment details and submit
4. You're in!
I'm always making improvements and I'm happy to hear any trouble you might have had. I'm also working on a Tour page to show more details about how things work.
Edit: Tour is now available!