I wouldn't go so far as to describe Common Lisp as ugly but it's an old and fairly large language that carries a lot of baggage does a few things differently from modern languages and operating systems. Personally, I tried to learn Common Lisp 15 or so years ago and found it difficult to get the hang of how it works.
The Lisp that I eventually got into is Clojure. If you're familiar with either Java or JavaScript then that's what I'd advise looking at. The language itself is well designed and elegant and if you understand the platform that it's running on (JVM or JavaScript depending on which variant of Clojure you're using) then that's very helpful. For me, being able to add a dependency on basically any Java library and use it without too much hassle is brilliant but I'd still love the language even if that wasn't the case.
The Lisp that I eventually got into is Clojure. If you're familiar with either Java or JavaScript then that's what I'd advise looking at. The language itself is well designed and elegant and if you understand the platform that it's running on (JVM or JavaScript depending on which variant of Clojure you're using) then that's very helpful. For me, being able to add a dependency on basically any Java library and use it without too much hassle is brilliant but I'd still love the language even if that wasn't the case.