If you really want to understand the FRN:
https://www.amazon.com/Creature-Jekyll-Island-Federal-Reserve-ebook/dp/B00ARFNQ54
Brief explanation on video:
And this series explains how it works today:
https://www.youtube.com/playlist?list=PLE88E9ICdiphYjJkeeLL2O09eJoC8r7Dc
THX! I'll look into those!