A lot of web dev people start off by writing command-line tools. Later this year, Rust will also be significantly easier to write server-side web stuff in, it’s a little tough to get into at the moment. You could also try front-end web stuff with WebAssembly! The PI stuff is also a good choice.
There’s links to learn more about these topics on https://www.rust-lang.org/ that should help you get started!