So start with the first. Fear that your work will not be accepted. When I started my acquaintance with several photobanks I too was at a loss and had no idea what vsetaki send to pass the first exam on Shutterstock. That was long ago, but still remember that I sent then 10 diverse works on white and black background. It was a simple wine glasses on a white background, the apples on the tree, a few photos nude nature (I was fond of such a survey), sunflower on background of blue sky and something I just can not remember. So these 10 pictures of my shutter has 7 and 3 are not adopted because of the noise. I thought I had all the pictures perfect quality and very sad time, but reconsidered once again realized that they are right and then all image revisited several times.
I will say that at the time I had a camera Fuji 700 (I think this was the name) but he really noisy (though like all the soap dish), although it was the 6 megapixel. So why am I all -) To be afraid and do not have to try at least once. If the first attempt did not work, then you have to work on our mistakes and try again. You no abuse is not even on the contrary you get some experience in processing their photos and learn to shoot under a certain order. But for the first time, that is, for exam still recommend making a few photos on a white background. You may want to visit Sam Lesser Penn to increase your knowledge.