I shared this first as a thread on Twitter but I think I want to document it also here:
Courses and Trainings
Hotwired ATS: Modern, full-stack Rails 7 development by David Colby is a paid full course teaching Rails 7 while building an Application Tracking System to recruitment.
GoRails Hotwire by Chris Oliver is a collection of video tutorials each one explaining various possibilities for Hotwire. While you are there I suggest making an account on GoRails - the best-organized resource for learning basic and advanced Rails.
Here are two places trying to organise Ruby on Rails resources:
On Twitter there are some big communities that anyone can join:
Rails Community with over 2k members
Ruby Community with over 600 members
Dry-rb community with over 200 members
Discord and Slack
Ruby InfoSecby postmodern is a chat room focused on Ruby & InfoSec: "The goal of this server is to help answer questions, educate others, highlight other Ruby InfoSec projects, and counter anti-Ruby FUD with information"
Ruby on Rails Link is one of the biggest online Ruby community.
Ruby Developers is another Slack group for Ruby developers.
Ruby and Rails info
If you want to discover more resources about Ruby and Rails I recommend to visit https://rubyandrails.info that I maintain and try to add fresh resources as soon as they appear.
You should also subscribe to Short Ruby Newsletter at newsletter.shortruby.com. It is a Monday morning summary of the articles, discussions, and news from the Ruby community. I watch a series of places like Twitter, ruby.social, Reddit, Linkedin, Dev.to, Ruby LibHunt, and other news sources.