I really recommend anyone getting started with a Lisp to just start with Racket. It's easily the most complete out of the box as well as the most user-friendly

I really recommend anyone getting started with a Lisp to just start with Racket. It's easily the most complete out of the box as well as the most user-friendly to get started with. I've come to love Clojure as well, but it is ... idiosyncratic as a Lisp and not very user-friendly when it comes to mistakes, and I think it's good to get a grasp on the basics in a Scheme-based dialect. I can't honestly recommend Common Lisp at all. Where Clojure is idiosyncratic, at least there's a driving logic behind it. CL is a product of design by committee in the worst way, and even many of the basics are needlessly confusing to a beginner.