Hows this...

Hey sorry for posting each of my designs for this site im thinking about creating..but I am new at this and can you give me some advice..thanx

try creating something on a specific resolution...
800x600, 1024x768.

Try using gradients. First off try some tutorials to get a feel for some things.
http://www.good-tutorials.com (New Design)

Each artist/designer has there own special techniques and things that they like to use or do.

http://www.colorlovers.com/

Go there and look at some of the color palettes and this will give you some ideas about what colors to use and what colors look good.

For fonts try using Tahomo and Verdana.

And I would try to use a little bit lighter background color. It to me is a bit bright.

Personally I feel that your design is much too small for the type of site your trying to create here. Your going to need a large amount of space for all of your information.. The designs you currently have are limiting that space to a little square in the middle. As smoke said, look around and try and find some color pallettes and tutorials that will help you. Good luck.