Rust is indeed supports low-level, but I'd personally argue that it is not "harder" to learn than C.
In fact, I find Rust far more intuitive and helpful in teaching me than I've ever found C.
C may be a "simple" tool, but to use it correctly, without (accidentally) causing crashes, segfaults, race conditions or Undefined Behaviour *shudder*) is far harder than in C.
As one of my favourite quote-of-the-weeks put it: The Rust Compiler is strict-but-helpful, whereas the C compiler will happily run into the minefield for you/with you