Ask HN: Getting More 'Technical' as PM

I'm a non-technical PM, have taken CS 101-202 type courses in college but never written production code. I'd like to be more "technical" in the sense, understand the basics of databases and backend systems work, what goes into building them, etc.

Are there any resources/books that I should read? Relatively vague ask I know. Thinking of reading something like this: https://www.amazon.com/Modern-Computer-Architecture-Organization-architectures