Here is a YouTube video about A simple binaural direct conversion receiver, and is part of a growing collection of videos I have found to be useful. The reason is demo how to create a receiver which produces a quadrature output for SDR software processing and understanding science related to software defined radio.
This tutorial, "A simple binaural direct conversion receiver" is free education you can watch, which will help you deepen your knowledge and be better prepared for licence exams, schoolwork, or operating radio equipment.