Indeed. Scheme it's amazing for embedded (such as s9) and its small size. Also, the SICP it's cool to do with Chicken Scheme and this ~/.csirc (and chicken install srfi-203 and srfi-216):
(import scheme)
(import (srfi 203))
(import (srfi 216))
(define (displaynl x)
(display x)
(newline))
(define pi (* 4 (atan 1.0)))
Even if Chicken has Hypergiant to play with 3D objects, Common Lisp has Kandria,
Sketch, Kons-9...
From Scheme, after finishing SICP as an Scheme exercise (and CS course), just jump into Common Lisp, and finish both Gentle Introduction to Symbolic Computation and Paradigms of Artificial Intelligence, where you will implement a micro-Scheme in Common Lisp itself as an exercise.
SBCL allows you to create working stuff with very few dependencies (uiop and the like from QuickLisp/Ultralisp).
With Scheme/Chicken you will get lost in a maze of eggs and SRFI's.
And, on CS/academics, if you finish SICP both GITC and PAIP on on Common Lisp will be a breeze and it will give you superpowers with these three books.
From Scheme, after finishing SICP as an Scheme exercise (and CS course), just jump into Common Lisp, and finish both Gentle Introduction to Symbolic Computation and Paradigms of Artificial Intelligence, where you will implement a micro-Scheme in Common Lisp itself as an exercise.
SBCL allows you to create working stuff with very few dependencies (uiop and the like from QuickLisp/Ultralisp). With Scheme/Chicken you will get lost in a maze of eggs and SRFI's.
And, on CS/academics, if you finish SICP both GITC and PAIP on on Common Lisp will be a breeze and it will give you superpowers with these three books.