So I decided that it was about time to set a signature and an avatar, but I can’t figure out how! I have selected photos, and hit save, but nothing happens! Hopefully someone here can help, as I’d really like to set one.
Is there a message at the top of your screen? It could be that your image is too large. If so, you will have to modify it. 
Thanks! Got it!
Now how do I put a picture in my avatar?
Put the image you want on a image sharing site, then get the direct link for it, then use the thing to do it. Look at linksligionare’s guide in the unrelated section.