How do you go about putting a picture on your profile?

While signed in, go to the Barthmobile Portal page.

At the top of the right column under "Welcome Back" you will see the link to "Your Profile Settings"

Click on that. At the top right of the Profile page you will see a link "View/Edit Profile"

There is a section for the avatar there.

Thanks

How long does it take to apear?

It's there!