Raden, to upload images is fairly easy. Just beneath your "Reply" box is an area for "Additional Options". The second one of those says "Manage Attachments". Click on that and follow through. It shpould give you the ability to upload any image on your desktop.
And accessing you "Private messages" should be even easier. Go to the top of the page. In the first box, just below the Vikingsword heading there is a thin box that runs the length of the page. On the far right in that box is the private message link that should take you to your messages.