Operating is the part of amateur radio that no exam can teach you. The conventions in this section are not laws — most of them are voluntary agreements that keep incompatible signals out of each other's way and make crowded bands usable. Start with band plans to know where to go, then pick an activity and learn it by doing it.
Related topics: activities and events for hamfests, special event stations and Field Day; contests and awards for what you can chase; the station for the equipment behind all of it.