functional dev environments have been the hardest part of learning cl for me. i don’t really want to use emacs, but it’s the wild west for other editors.
setting up emacs wasnt hard per se, but emacs is just so much. i spent more time troubleshooting how to use emacs and fix issues with it than learning the language, which just makes it all a little lame.
Common Lisp!
It can be a little esoteric if you don't have experience with the paradigms, but I've never used a language that felt more free.
On SBCL you have typing support, CLOS provides an OO interface, and it lends itself well to functional style programming (despite not having a type system as powerful as say Haskell). Additionally, the ecosystem is quite stable and mature, any library of functionality you might need is likely available.
save