Dude

its a good effort but by adding another 25% effort into the model I think it will be there pretty much. really it needs edges to sharpen areas up a bit. Modelling anything in a realistic manner really does require some hardcore observations and not just following a plan of something. I think by doing what Ive said you'll get there. Also take an approach one step at a time, get the model in shape first, then move to textures then lighting, dont try to cram it all in at once, theres enough to get right with the model and understanding the forms etc of that before moving into rendering etc. Theres plenty of people here to help you along....

cheers
Jay