Many people talked about reading the book "Clojure for the Brave and True", which I did. It's nice to begin with it for the first chapters and read the rest later, after some coding, in my opinion. For me, the best resource was the MOOC on Clojure available at https://moocfi.github.io/courses/2014/clojure/ You can do the exercises, have the system check your results, but don't get grades or any certificate of completion.

I didn't finish the course as I moved to Elixir, although I liked Clojure very much. Elixir is also functional, much better for newcomers, lots of support, people, documentation, examples, books, courses, growing very fast... And one doesn't need to wait several seconds to start the virtual machine.