The Perl language, itself, is comparatively small. The best way I know of to “learn it” is to continue “automating things at work.” Then, when $work is not giving you particular things to do, just make-up something to do, and do it. Make something substantial, consisting of multiple modules and OOP, since that will be the most-realistic scenario.
Learning to program a computer is like learning to swim ... books can only take you so far.
But, with Perl, “swimming” (“DWIMming?”) is really only a small part of it, because Perl (more-so than many other languages) comes with a marina full of boats of all shapes and sizes. Usually, when you start on a project with Perl, you do so by picking-out a handful of well tested “boats” then stitching them together with code of your own devising. “Learning about Perl” therefore has a lot to do with “learning about CPAN.”
Thanks to virtual-machine technology (e.g. VMWare or VirtualBox), and dirt-cheap real-big external hard drives, the Linux environment is very easy to get to now. I”d strongly suggest familiarizing yourself with it a-n-d Windows. Learn about Perl in both environments.
“Learning about Perl” is an abstract target ... you can’t hit that ... make it concrete. Make it a bunch of little concrete stepping-stones.
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