The best way to learn is to just do it! When I'm starting out with something I generally have a few ideas of basic things I could do with it, generally that's making simple CRUD apps (when I started using Axum I made a simple API that returns json from a file directory as long as the directory is formatted as: /type/name. Then I went and made a website using vanilla js/html/CSS and made everything run using the backend).
This second project is great because there's always something else I could do like auth, like not doing a post and redirect to the same page for updates, like creating dynamic client & employee pages, like using an actual db instead of a script to make CSV files as a db. IMO, THIS is where you learn things.
My brother in Christ, this isn't a crate, it's a programming language written in rust.