G'day bio170,

Welcome to the monastery.

I recommend you bookmark, and familiarise yourself with, http://perldoc.perl.org/perl.html.

Here you'll find the documentation for the core Perl distribution (syntax, functions, modules, etc.) as well as other resources such as tutorials, FAQs, and so on.

Modules not distributed with Perl can typically be found on CPAN; the most useful link, that you'll probably need, is for the search function: http://search.cpan.org/.