K4401 - Need Explanation of Diagram

I’m independently researching audio electronics, and I have successfully put together the K4401 kit (bought it from an electronics store, figured it would be great practice material since I’m teaching myself how to solder), but more importantly: how does this work? I don’t follow the diagram provided in the assembly manual (pg. 10).

I’m basically looking for a rough explanation of what happens to the flow of electrons when a button is pressed and when the potentiometer is turned in either direction, along with what roles the resistors, capacitors, diodes and transistors play in producing the sound effects.

Thank you in advance for your help!

Sorry, no circuit descriptions.

Where can I get help on this then?

Maybe other forum users have the means and the time to explain you the basics of electronics and the operation of this circuit in particular, however, this is beyond the scope of this forum.