I think I could ask an LLM to explain linear algebra. I think it would be less good at the 'here are some things you should know' aspect. One reason for this is that people might not ask, but the LLM might not agree with your list anyway.

I think there is still a place for a book here. I think I might buy a book (or may have done 10 years ago when I was still coding) of things you should know (especially from a respected publisher), that being a longer form book I could work through over time.