Go to a site called
Photobucket
Google it. Set up an account at photobucket . Upload your pics to your account. Before uploading you need to reduce the picture pixel size, I think its 480x640. I use photoshop for this , theres other ways, someone will chime in. You reduce pixel # to make the file size quicker to upload. You can store your pictures at photobucket, each pic is assigned a internet addy which is the http this site is asking for.
Hope this at least sets you in the right direction. Also see if this site has a thread with picture posting info.
Steve