I think you're trying to do too much in the sig, as most noobs do. Forget the tech border and scanlines, they're too played out and shouldn't really be used imo. Practice making you're backgrounds more, the bg is like the foundation of the sig and once you get good at that, the rest will start to fall into place much easier. Try to make the bg match with the colors of the render that you're using. Then of course you will need to work on your text a bit also.

There are plenty of tutorials on this site that will help you along. Just keep practicing and feel free to ask any questions you might have. Theres alot of talented members here that are willing to help out the new jacks.