On Oct 26, 2011, at 7:59 PM, Liam Proven wrote:
  So tonight, I tried working through some of this with
Stephane Tsacas
 on chat. I tried installing Steel Bank Common Lisp, but every other
 thing I type generates 10 lines of error messages and takes me into a
 debugger. Stephane has recommended Allegro Common Lisp, but it doesn't
 even seem to understand cursor up/cursor down. 
SBCL is high-performance, but it's a bit finicky.  I've found GNU CLISP to be a
pretty easy-to-start environment, at least.  You may find a Scheme interpreter to be a bit
easier, even; Scheme is basically a very terse dialect of Lisp (I know, I'm
oversimplifying, but if you don't know either, it might as well be true).
- Dave