At the bottom of the page there is an option to put it on full site, select it, and then go to the navigation bar at the top of the page and select photos, from there you should be able to upload photos from your library. Using the mobile site is often just a pain, so I don't recommend it.
No you need to upload the photo, then you write something like File:Shipnamedotjpeg with the square parenthesis [[]] at either end.