How do I translate a fusion 360 model into plastic

Im a retired engineer who many years ago brought the plans for a HP42 biplane airliner but never started the build until a few years ago but it went wrong and I gave up. Then I thought why not take the opportunity to learn CAD and modify the the design maybe using more modern manufacturing techniques, for instance make the nose cone a 3d printed part, and more and more why not make the whole thing a 3D print. I took the nose and shelled, it because Im into designing solid bits; but is that the right way to go? Where do I do to learn how to do it properly?
It doesnt help that I do not yet have a 3d printer.