I put together this video to help novices figure out how to determine which circuit breaker controls their outlets and light switches.
This will help you detect the circuit, map them, etc. In the video, I am using something called the Circuit Detector. I am also discussing the labeling of the panel. Many of the new panels have large labels that are easy to work with. However, many of the old panels have very small labels with little to no room to write anything.