I found Phil's lab content [1] [2] indispensable for just this. Phil is a great communicator and gives in-depth explanations, so I didn't just watch most of his youtube, but also bought his mixed signals course and was very happy with it.

Phil also recommends this lecture in one of his videos [3], which is still one of my all time favourite lectures ever.

[1] https://www.youtube.com/@PhilsLab

[2] https://www.phils-lab.net/

[3] https://www.youtube.com/watch?v=QG0Apol-oj0