Well, first off, you earn my commendations for making a pretty good start on these forums and being good with graphics. You've earned my respect.
Secondly, you'll want to kind of make a writeup of what your server will be about, how it will work, etc. You'll really need to put a lot of effort into that alone just to get people interested.
You'll also need images and layouts and a map if you can. I'm sure that there will be people willing to help you (both here and in the Playerworlds and Development Forums) with scripting / level making / map generating, etc.
There's also the search feature for the forums in case you want to go back and find FAQs and such posted by other members many months ago, I'm sure you'll be able to find something.
Good luck, I like what you have so far, it looks like you have a lot of potential to go far here.