Way too many colours, the colours don't blend, the green sticks out like a boner, the emblem doesn't even look right. Need me to go on?
Some advice:
>> Start modding with the L96A1. The flat surface of the body makes it a lot easier to start off on compared to other mods, and pictures will actually turn out straight.
>> Use blending modes like overlay and such since it makes the colours blend better.
>> Don't use colours that clash in a bad way, i.e. having all dark colours and a non-overlain fluro green.
>> Don't stretch pictures so that they don't fit on the body; either make the image fit on the body or don't use one at all.
>> Start off simple and don't try to do complex mods until you get better at PS or have some experience.