How do you put a pic under your username as an icon thing? (( don't know what to call it....avatar?? ))
Yes, it's an avatar. Click on "Profile" right above the banner ad at the top of the page. At the bottom of your profile page is the avatar section. Whatever picture you use has to be within the requirements of picture size (80x80pixels) and file size (8kb). If it exceeds either of those, it will not load up to your profile. Then click 'submit' and you're all set.