Here is a YouTube video about DIY SDR DSP Radio with Raspberry Pi and RTLSDR, and is part of a growing collection of videos I have found to be useful. The reason is demonstrated combining of Raspberry Pi with RTLSDR for a small compact effective receiver system and understanding science related to software defined radio.
This tutorial, "DIY SDR DSP Radio with Raspberry Pi and RTLSDR" 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.