It means improving your draft. And there are better and worse ways to go about it. I generally start with a structural refinement, scenes, etc. The final pass is at the word and sentence level for grammar and spelling and the like, once you have your plot in place and the structure finalized. (Because what’s the use in working on paragraphs you might later remove.)
If you want to write fiction professionally you’ll need to learn the craft of writing. I suggest joining an online writer’s circle, something like Critters.org. Then start reading the classics on craft, like Lajos Egri’s Art of Dramatic Writing. Starting at your age is very promising.
My apologies, looks like gremlins ate some characters from the link… Fixed that. It should bring you to another board, which we use for organizational stuff. I’m afraid you need an account there in order to post, so maybe I have to come up with an easier way to apply. Like a thread on LvMI forums.
Whatever is your current angle, provided it is libertarian
I thought you are interested in fiction, so what about taking a few libertarian and/or economic principles and demonstrating them in a short story? Or maybe just a story of a statist coming to his senses and seeing how the state destroys humanity? Like Pictures of the Socialist Future, but about the hurricane Sandy and the government’s reaction to it? An enthusiastic supporter of the government’s policies becomes more and more disillusioned in them, when witnessing their results firsthand.