Hello there
go to the main gallery
(
http://www.elfquestfanart.com/index.php?action=media )
Quite near the top the should be a line / bar with a few labels "new & featured art" "unseen" "search" and "My Albums" (on the outer right).
Go to My Albums.
http://www.elfquestfanart.com/index.php?action=media;area=myacreate an "Album" (directory aka folder aka album)
go into that Album
there you have now buttons under that bar with "My Albums"
that say "add an item to this album", "edit" and "mark as seen"
the "add" should bring you to the upload interface where you can set a title, some description, choose the very file (check that it is either a PNG or JPEG encoded image and not too large in filesize) and you might want to add some keywords.
If everything seems correct, press submit and wait for the upload to take place.