Fine Art is Fine Art, if you say it is, there really is no more to it than that. I mean, if I take a photo, call it "Fine Art", can anyone say it isn't?
The gear you are using is fine, if you're happy with it. All you need is a camera you like to use. I like my Leica M3, but that's gear-lust, it won't take any better photos than a $50 Pentax ME.
As for finding your photographic voice, I've no idea. Just try to take photos you want to hang on your wall is probably a good place to start.