Go to the top right of the page Click settings -> change avatar. There are premade ones available or you can load a picture from photobucket or any other online picture storage place. Hope this helps
Go to your settings (upper right hand part of the screen) click it, then you'll see an option for editing your avatar, go there and you can choose ones from here or put in your own from URL existing site or your PC. Welcome to TYM Fistdacuffs