due to "...a x10 hosting symbol" I assume a tab in your browser...
do a Web search for a file type --> [ favicon.ico ] - you will need to put one in the folder [ public_html ]
After you sign in, your name will show at the top of the page, right corner. Move your mouse to point to your name and a drop down menu will appear. Click on "Avatar" in the menu. Browse to the avatar you wish to use or use the "Gravatar" option and follow directions.