I thoroughly recommend watching these videos to give yourself a clear introduction to electronics theory. take your time an learn at your own pace, re-watch parts if required, Enjoy these and learn.
ESSENTIAL & PRACTICAL CIRCUIT ANALYSIS: PART 1- DC CIRCUITS (1 hour 37)
Essential & Practical Circuit Analysis: Part 1- DC Circuits
ESSENTIAL & PRACTICAL CIRCUIT ANALYSIS: PART 2- Op-Amps CIRCUITS (1 hour 47)
Essential & Practical Circuit Analysis: Part 2- Op-Amps
Here is a video that is more advanced explanation of why electronic circuits work.
A lot of what is taught about the way energy flows in a circuit is often miss leading as just a flow of electrons, so I highly recommend the following :