I used Common Lisp as my main language for about 6 years (long time ago now) - yes for the first few days the syntax is a bit jarring but I've found that any new language is fundamentally different in approach to what you are used to has that effect (pretty much the same happened the first time I saw C, Lisp, PostScript etc.)
I recommend Clojure/ClojureScript. It's quite practical for web development and also an excellent gateway into functional programming.