ABCL is an implementation of Common Lisp (CL). Since it runs in Java, it has slightly different ways of loading and compiling, and it has special Java-specific hooks. Since it implements CL, it shares the same core language as all other CL implementations.
This seems to be the primary document for getting ABCL installed and running.http://common-lisp.net/project/armedbea ... -user.html
Once you figure out how to get a REPL (interactive lisp prompt) running and/or compile and run lisp files, start looking at general CL resources.
The most commonly recommended CL book ishttp://www.gigamonkeys.com/book/
The easiest way to install CL libraries ishttp://www.quicklisp.org/beta/