I'm a current PA student, so let me know if I can help answer specific questions about PA education. To clarify, PAs practice medicine in all medical specialties and in all clinical settings, and about 1/4 of certified PAs practice in primary care. A simple search using the current professions should get you helpful information, including comparison charts which is useful. Shadowing could definitely be the next step, to get an idea of what it's like to work as a PA vs physician vs NP. I hope this helps.