They're both very easy, fun languages, and decent fluency in one will give you a good foundation to get into the other. And going beyond roll-your-own server admin stuff, I do enjoy both Rex (perl) and Ansible (python).
I don't have an off-the-cuff rec for a python book, but Modern Perl (2014) by chromatic is available online, isn't very long, and should give you a chance to test the waters and decide if that's the way you'd like to go.
I don't have an off-the-cuff rec for a python book, but Modern Perl (2014) by chromatic is available online, isn't very long, and should give you a chance to test the waters and decide if that's the way you'd like to go.