You're limited to what you can put on your signature until you clock up more posts on here. I've only managed to get one on for now, so will you as you only have 14 posts.
What I did was: find the award you want on someone else's profile, right click on it, click "Properties", copy the "Address", go to your "Edit CP" page, "Edit Signature", Then there's a little icon at the top of your message space for "Insert Image", click this then paste the http address that you copied into the box. The picture of the award should then show in your signature. Save the signature.
There may be an easier way to do it, but this worked for me! Good luck!