This signature is one that I went further with and was sorta an experiment. It isnt like my normal signatures.
the text is bad, I would suggest not putting text. The render doesn't blend with the background and the c4d is just kinda random, it is also over contrasted on the render. The only thing I can keep suggesting for you is tutorials from a gfx site, imagenskins, gfxskool, beesknees, gfxbb.org, hidden designers... google any of those and you have a good site to learn at.