I'm a junior programmer who never went to college and writes Python for a living (ML researcher). I've been itching to learn another programming language, ideal

I'm a junior programmer who never went to college and writes Python for a living (ML researcher). I've been itching to learn another programming language, ideally something fast and low-level, and have had my eye on Rust now for some time. But in my brief experiments trying some of the docs' hello-world projects, I'm already finding myself a little out of my depth. I'm realizing I don't know anything about compilers and very little about how languages work on a technical level -- stuff like "strong" vs. "weak" typing, memory management, stacks and heaps and garbage collection -- I've seen all those terms before but have no intuition for what they mean. I never have to think about these concepts because Python is such a high-level "it just works" scripting language. Could anyone recommend some online resources for learning about the computer science of programming for someone with little prior experience? I'm not quite sure where to even start, but I'm eager to learn because at the moment I don't really feel like a "real programmer", more like a script kiddie. Heck, I only learned to use Git properly like 6 months ago!