Rustup (the Rust toolchain installer) is now natively available for the new Apple M1 devices, allowing you to install it on the new Macs the same way you'd install it on other platforms.
Rust (the actual Rust compiler) is not yet M1 ready, but progress is being made in this direction. Rust 1.49.0 features two targets reaching Tier 2 support: 64-bit ARM macOS and Windows. Developers can expect both of those targets to have prebuilt binaries installable with rustup from now on! The Rust Team is not running the test suite on those platforms though, so there might be bugs or instabilities.
Rust is a multi-paradigm programming language designed for performance and safety, especially safe concurrency. Rust is syntactically similar to C++, but can guarantee memory safety by using a borrow checker to validate references.