It sounds like you could greatly benefit from taking some time to gain a greater understanding of what exactly it is you want out of a career and what exactly it is you could see yourself doing with an advanced degree, whether that be a PhD, MD-PhD, or MD.
You make "this information" more understandable to the public by publishing. Doing research isn't about just fiddling about in a lab doing experiments--it's about expanding the frontier of human knowledge. If you play your cards right, you will also be able to share this information outside of the context of scientific journals (e.g., review articles, Popular Science articles, TED Talks, etc.) that will allow for this information to be shared in a way that is more understandable to people that lack the technical knowledge we as life scientists have.
All research, even basic science, is done with hope it will someday have an impact. If you are interested in research that is more translationally focused, it would probably be advantageous for you to look into public health graduate programs or translational research programs. Additionally, bear in mind that having an MD does not preclude you from doing research. Luckily, there is a place in research for people with a vast array of interests!