While I am actually not a fan of quicklisp for various reasons... just go for it? Emacs, slime & quicklisp and you are ready to go. As soon as you have created

While I am actually not a fan of quicklisp for various reasons... just go for it? Emacs, slime & quicklisp and you are ready to go. As soon as you have created your first in-house libraries you'll want to look at asdf's config so you can override the quicklisp repo.