Rust is this nice critical mass point where I suspect there are great resources out there. It's something I'd probably start hacking with if I were building toy projects.

You said no courses, but you didn't say no course materials. I'd probably do something like https://rust-exercises.com/100-exercises/. Ideally I'd find some kind of repl-based progressive exercise system. It's what I did to get acquainted with clojure a many moons ago.