Perry Mehrling's "Money and Banking" [1]. What I enjoyed about this course is that Mehrling focuses on how the economy works _mechanistically_, on what is actually happening on balance sheets throughout the economy. For me, this really pulled back the curtain on exactly the stuff you mention above (interest rates, central banks, QE).

[1] https://www.youtube.com/watch?v=KNEouYM5wRE&list=PLSuwqsAnJM...