Try Practical Common Lisp or Land of Lisp instead. They are both much more accessible. Then read ACL.

Practical Common Lisp (first few chapters)

do a toy project

read a lot of old Common Lisp code floating around on tarballs

then read Paul Graham's books

I believe that the absolute shortest way to start with Lisp for somebody that is already familiar with programming is Franz Inc course that is freely avaialable online here: https://franz.com/services/classes/. It goes straight to the point and has exercises. Practical Common Lisp is a good book but takes a too long route to get to the point. I would recommend it only to somebody that is not a programmer by trade.

Get a copy of Racket, take notes, type in the programs for yourself, experiment. This video is the best most direct introduction I have yet found.

https://www.youtube.com/watch?v=a5p8DPbaokE

Learning Lisp, Scheme or Clojure is more about learning ideas than anything else.

Later you might want to learn Alonzo Church's Lambda calculus after learning some set theory and mathematical logic.

Skip CL for now, and use Clojure or Racket. CL's ecosystem requires some hacking to make it work pretty often, and the only true editor for it is Emacs and Slime, so it's not a great out of the box experience.

Racket comes with an editor and a ton of libraries, so I'd recommend checking that out first (and then coming back to CL later maybe)