Welcome, Jay. It is wonderful to hear of your enthusiasm. What I would suggest might not sound as exciting, but it will make you a better EMT or paramedic in the future if you're really looking for some concrete way to take a small step in the direction of your desired profession. I would suggest that rather than worrying about a first responder course at this stage (when you won't be able to be in a position where you could use any of your skills), focus for now on learning the science. So many qualified EMTs and paramedics lack a solid knowledge of anatomy and especially physiology that can be so important to understanding what is going on in our patients (and figuring out how to best help them).
So this isn't probably the type of thing you were thinking of, but I'd suggest working on learning about anatomy and physiology bit by bit. Much of what we deal with is shortness of breath and chest pain (possible heart attacks), so learning a lot about how the heart and lungs function in health will make it much easier to learn about how they function in disease at some point down the road.
Unconventional, I know (and I'm sure someone else will call me out if it is a bad suggestion), but if you were to go ahead with it I'm sure that someone could recommend a good textbook and that there would be lots of help from the forums if you had questions about anything you're reading. (On second though, it is 2013 so you could probably just use things like Khan academy videos to learn about this stuff... though a traditional textbook is still nice to have!)
Good luck!