First try to make a Camera Mapping, it's no perfect, is probably bad, but i hope with more practicing and your advice i will be better . If you can see it with the DA player, you can see it on vimeo: [link]
Good job for a first attempt for sure. Nice matte painting as well. If I might suggest, for a next project, try a more limited view, such as a canyon, or add some more complexity - more foreground elements. You are on your way so keep going and good luck!