(1) You get an email with this in it:

(2) Click this bit:

(3) It takes you here, fill it in

(4) and click:

(5) You get another email with this in:. Click Activate.

(6) Now go back to the first email and click "Accept invitation"

(7) That takes you to the blog. Use this to make a post

(7) Click this picture to see the actual blog: