Cindy I kinda know how you feel. Working with sites can be extremely frustrating, and it gets worse cause even if you do complete a site its even harder to get people to use it.
I think you need to explain a bit more on what you want as far as your site, as pokepets says what you want coded. Is your dream a particular site or just being part of a site?
I am sure you have seen my site before
http://chaoisland.netne.net/ and if you want you can partner with me. I definitely need help when it comes to literature, so if your good at writing or want to be a community leader that's what I need. Of course you can help with art and code, however my adopts are ingame 3d images.
Here's what I think you should do though. Because you are lacking in experience you will need to partner with someone and increase your knowledge of running a site before trying to run your own.
If you are dead set on running your own site I would then suggest running it on
http://99webs.info/order/ me and the admins have experience at installing scripts and manipulating them. example would be the forum and ads i have added to my site here
http://www.chaoisland.netne.net/forum.php#/
we have a free construction period and if you post in our forums then any package can be free. while we will not code something new for you, that's left to the devs of which ever script, we are familiar with them and can add code already done.
best of luck to you which ever you decide