Two things. One, when you upload your works, go to a site like TinyPic - Free Image Hosting, Photo Sharing & Video Hosting and upload there, that way you can copy the img code and we can see it without going through links, as for your sig, a few tips. Since your a beginner, try To keep with one render, play around with effects till you find what you like, and try and follow a few tuts, they're always helpfully and show you the way around a few techniques of making tags. Your tag so far just looks like you pasted the render, added a black background and added the text. Like i said, tugs are helpful for showing techniques, and help you get better.
Sorry if there are any random words, my phone is doing the gay autocorrect thing.