congrats! if you click the "image" icon and click the "from computer" tab, then click the "choose file" option, brows to your file, select "open" the when you come back to the Image dialog click the "upload file" option.
PLEASE make sure the picture is 640x480 or smaller if possible. If not, PM me and I will send you my email address, you can send it to me and I will shrink it to size. (...or post it for you if you would prefer)
Steve