My first step would be to check out the wonderful Tutorials Section on this site. In this section you will find a good bit of info that should get you started.. If I'm not mistaken, you can also view man pages on OS X by opening a Terminal Window and typing:

$ man perl
[download]

or:

$ perldoc perl
[download]

Which is the same doc. :-)

-- Can't never could do anything, so give me and inch, I'll make it a mile.