Well, having your story almost finished is a good start, but it depends on what your plans for your VN are. Don't expect to make a perfect AAA VN on your first try, is what I'm trying to say. And you might not want to try to make the entire game on your own either, it's a lot of work if you don't have any previous experience. My advice would be to finish your story, then try to build a team that can help you with the art, programming, etc. Free work is available if your project is interesting enough, just keep your eyes open for it. And the most important thing is to not give up, VNs (and games in general) can take many years to get from their initial planning to release, so don't feel discouraged.
Anyways, I've went on for long enough. Hopefully you can pull out something useful.