With the kind permission of the author, Deborah Tatar, I just uploaded her 1987 Digital Press book _A Programmer's Guide to Common Lisp_ to the Internet Archive.

The ECL (Embeddable Common Lisp) project and the book _Foundations of Computer Science: C Edition_ by Alfred V. Aho and Jeffrey D. Ullman would provide a learning environment

   https://ecl.common-lisp.dev/
   http://infolab.stanford.edu/~ullman/focs.html