Do you happen to have any other suggestions about reading?

I am currently reading "Asynchronous Programming in Rust: Learn asynchronous programming by building working examples of futures, green threads, and runtimes" and there is vague talk about how cpus process things, but it really would like to know more. I am even curious about what is actually happening in hardware. It seems hard to determine where to start.

I don't have formal education in this field unfortunately.