Hey chicky,
I just joined and was trying to figure out how to update my profile, but
just worked it out then saw your post so thought I'd let you know how to do it!
On the top right hand corner of the page, you will see 'signed in as... your username'
Click on that and you will be taken into an area where you can update your whole profile
including your picture, bio, blog, website etc. etc.
Hope this helps!
Maria
Cheers to your success!