I'm halfway through Michael Hartl's RoR tutorial (IMHO, it's very good) and so your comment is a little disheartening. What are the top one or two technologies (aside from just Javascript) that you would learn today?
I would then move on to learn about elixir and Phoenix if I were in your position. Phoenix is similar enough to the good parts of rails but all the really nice stuff is way better than rails. ActionCable in rails is a joke compared to what elixir can deliver.
Or, if you ask me, learn Elixir + Phoenix. I'm betting part of my future career and my company on it, because I believe that it's the future. But Go, Clojure or Scala are great choices for web development as well these days.
I have a fair bit of Java experience but it isn't current (I did Tomcat-based stuff).