Taking Eric Normand's course Beginning Clojure (https://ericnormand.podia.com/beginning-clojure).

As someone with most of their experience in JavaScript and Ruby, I really like how Clojure is just so _different_. It's like someone who speaks English learning Chinese instead of a similar language like Spanish. I think doing that opens your mind and teaches you more than if you learned something that is "more of the same". Similar to how it is useful to learn about other fields instead of continuing to grind away at "more of the same" within your field.