What's the official website? That would be clojure.org Wanna try Clojure before installing? Checkout the online REPL at repl.it What's the quickest way to get started? Check if Java is installed in your system by running: java -version If not, follow the necessary instructions based on your OS. OS X/Linux/Windows Install Java (a.k.a JDK) Install Leiningen Start a REPL by running: lein repl OS X us