@dylanisaiah difficult to enumerate. Some bits feel very old (like the "car" function named after a register on an old IBM mainframe from the 70s) and some of it is space age: getting into macros and writing programs that write programs.
It's a language that you will be learning new things about for years and years.
A good place to start is googling "practical common lisp" as a free introductory book.
It is, unfortunately, completely unemployable!