I got it! Since, I am in the Mountain time zone, most days registration was closed by the time I got up and made it to the computer. I took the iPad with me, so I could keep refreshing while scrapbooking. I saw it open, ran downstairs to the computer, because I wasn't sure registration would work on the iPad. But then I couldn't get to the Pottermore main page because it was slammed. But I had the question on the iPad and so I could go directly to the Magic Quill page. Quill is easy to find, and registration went quickly.
I am FlooRiver181. I had to chuckle, because my ancestry.com account has 181 at the end of it too. So at least, it will be easy to remember.