Hi Cooke350,
All you do is first find a picture or photo, it has to be no more than 100 pixels in width or height and in the .jpg format. Then after signing in, look for your name under the menu bar and on the far right. Click on your name. Then under settings you will find a spot for your avatar. Just click the button to browse to it and upload it. Update your changes and a way you go.
If you need any help, just let me know and I can step you thru it.
Thanks..