Hi Hows it going?
once you have logged in,you will see "My Account" at top right of screen.click on this and it will take you to your account page,here you will see a tab for "settings" click on that.
At the top of the settings is the avatar settings,with instructions how to add them and size allowed for your owm avatar from either PC,web or the ET gallery.
Once you have picked the avatar go to bottom of page and click on save changes and that should be you ready to go.
any problems please feel free to ask.
also welcome to ET while your here feel free to browse around the forums ET forums
and if you have not seen this yet please read ET site rules
Enjoy your stay with ET