They actually just released a new, rubust getting started guide that is an EXCELLENT place to start learning the framework: https://guides.rubyonrails.org/getting_started.html. I highly recommend starting there.
The new getting started guide is great. Chris Oliver is a great teacher. Afterwards, if you want a 102-style tutorial, I'm a big fan of https://www.hotrails.dev/. It goes step by step and explains how Hotwire works and how to use it.