ok, the render isnt that bad, but when your blending another picture i find its better to change the picture to gray scale and blend it like that (hit ctrl + u and click colourize and move the saturation to 0)
the text isnt great, you could do with some decent fonts (try dafont.com) also try some effects like a drop shadow or light stroke around the text. if you do want to use a stroke i suggest making the text quite big so that the stroke doesnt take over the text.
the background isnt too bad either you just need some better brushes (
http://browse.deviantart.com/resourc...ons/psbrushes/) thats where the deviant art brushes are.
all in all its not too bad for a first but youve got a long way to go.