I hold a private pilot certificate, as well as a remote pilot certificate; I am also a photographer. I just wanted to share with you some advice from a budding pilot who comes from the much larger world of flying that is general aviation. I hope this helps you understand basic components of what us normal pilots deal with, while also helping you understand how we operate and how to avoid us. Understanding is critical to safety in many instances.
This is not intended to be a know all be all to flying drones in the States. Most of this information is supplemental, and, again, is intended to help you understand how airspace works, and to help you find what you are looking for. As with anything else, do your own research.