There is no "language called PERL", it's called Perl with only the first letter capitalized. :) And the program you use to run your code is called perl with a small "p" at the beginning!
In addition to the great resources others have suggested, I'd also recommend the free PDF book called Learning Perl the hard way. Despite the title, I found it the easiest and quickest intro that helped me actually start using the language right away. Once you start using the language and get the sense of it, the other guides will start making much more sense. In my humble opinion the best way to start will be to jump into the language with this book, try things out, and take the help of perldoc and Google when you need them. That would be the most hands-on way of learning that would help you quickly get the feel of the language, and also keeps it fun! :)