https://www.udemy.com/course/blender-rigging-for-beginners-rigging-your-first-character/

By following both tutorials, you will learn about the basics of rigging and how to rig your own characters! The tutorials include a voiceover in which I guide you through the process from start to finish.  For the rigging demo I use a skeleton character from my “Blender: Make a Low Poly Skeleton 3D Character” tutorial but you can use any other biped character and follow along.