being your first photoshop piece implys your lack of experience with the functions and tools. those will improve as you spend time with the program.
main issue i see is with the design, which doesnt matter what program you use.
looks like generic layering of plates + a somewhat techno mask on top of the V for vendetta/anonymous mask.
the mask itself has been drawn ok, but the rest of the design isnt looking too promising.
take your time on the first steps, figure out what you want, befor you draw it, dont just draw and erase untill something decent comes up. you need a vision/plan