What a good idea, thank you.

One thing that would be useful at the start is something on just how polyglot the reader is expected to be.

I have just read "Rust's type system is based on Hindley-Milner-style algebraic types, as seen in languages like ML and Haskell." Not knowing either of those, it's difficult to know what to do first: look up H-M, look at those languages, or look at another Rust guide.