Welcome aboard. First off, I'd like you to check out all of the links at the top of the writer's lounge page (all the ones that say something to the effect of "grammar advice" and "fanfic writing 101" and the like). Reading those would definitely be a good start, and while you're doing that you might as well tell us a bit about your fic. Is it a fantasy novel? A romance? A mystery story? Once we have an idea of what you're writing, someone that enjoys the particular genre you've chosen may step up to the plate.
Now: I can't guarantee you'll get a beta reader, but this is a step in the right direction. If you don't get a beta reader, then don't worry too much about it. Just post your fic when you feel ready, and one of two things will happen: we will either a) leave it where it is and people will be able to come in and review it, or b) if we feel it needs some work, we will move it into the revision bin. If the second thing happens, it's not the end of the world: it just means you need to polish your fic some more before we can move it to the front page again.
Otherwise, keep at it, and show us what you've got!
