If you know some scripting and regular expressions, it is not too difficult to deal with perl. Read any book or tutorial on the basics - scalars, arrays and associative-arrays and print the perl quick ref card. perldoc, perlfunc and perlre manpages are your friends. If you need some fancy module, go to search.cpan.org and you will find a lot of modules on a variety of additional functionality.
No matter what people say, it is always good to master one scripting language. It doesn't have to be Perl. But, Perl in my opinion covers a wide base and very well supported. It will make you so much more productive by not having to deal with a different syntaxes and limitations of separate tools.