This link here Reflections on Skills of the Skillful is presented to you, it got some more valuable advices and links from the beloved monks in here.

http://www.perlfoundation.org/perl5/index.cgi?recommended_online_tutorials, this other link seems promising as well, I am going to start studying it after finishing the Perl book

Just wanted to give you more in the basket to select what suits you best. Take care...