Hi KP

In trying to find out what I did I've hit on:
Click on "My profile" near the top left of the page (below the Forums tab) and from there you should get options down the left side of the screen.......going down this side you should see the option for "Edit Avatar", clicking on there will give you the option for choosing a "ready made one" or to upload your own.
Hoping this helps............AND welcome to PC

Alison