If you click the button on the sidebar you will be directed to a new player page. Fill in your player details and upload the player image. If you set as 'main' then your player will be set as your avatar (fixing that at the moment). Currently you can only view your own players. Like button is there for when you can view others'.
This is an effort to bypass the avatar approval process. Now all you need to do is save your player image from the rankings, then upload here.