Specialization question: *nix admin vs Windows admin?

Question

linux

Not so long ago I realized that I was stupid - I realized at my 27 that I kind of dealt with a lot of things in the course of work, but this knowledge is not deep. I decided to correct this matter - I ordered books on the administration of Windows Server and * nix systems, in addition to them, books on Python, MySQL and PHP.
The books have arrived, but now I'm sitting, looking at these books and scratching my head - what exactly do I really want?
Learn networking, AD / DC to perfection, PowerShell, Hyper-V, etc. or pick another CentOS/Ubuntu Server, write scripts in bash and Python, administer MySQL or create some projects in PHP or Django?
Now, in parallel with solving problems at work (I set tasks for myself), I am trying to build myself a training plan. To be honest, *nix systems seemed much more interesting to me - the number of tools and solutions for different tasks is huge, the openness of the software, the community, etc. - all this is very sympathetic to me, but there is one BUT - at my current job I deal with Windows systems on workstations, it is unrealistic to transfer them to * nix, since we have all sorts of autocads, MO and customers working only in this software.
That is, according to the idea, I should deploy DC / AD / WSUS / terminals / something else there (although no one requires me to do this ..), but I myself once again pick the proxy on CentOS or NAS on Ubuntu Server, configure raid on the ZFS file system, look at LVM chips, configure KVM virtualization, and so on ..
It seems to me that the * nix-admin path is more interesting, but I doubt it and I don’t know anything about the prospects of this path in Russian realities.
And while I don’t know anything about this path, I wander - either I teach Python at Codecademy, or I pick WS at home, then I jump from a book on one OS to a book on another ..
I need advice from people who have probably passed such a stage in life, or just understanding what is being said.
What development options are there? Who is more promising? What is the best way to arrange training?
The literature that I have in one form or another is
Unix and Linux. System Administrator's Guide - Evie Nemeth, Garth Snyder, Trent Hein, Ben Whaley
Linux. Installation, configuration, administration - M. Kofler
Linux. Required code and commands. Pocket Guide - Scott Granneman
Windows 7 Administration Practical Guide and Administrator's Handbook
Windows Server 2008 Administration Microsoft Tutorial - Orin Thomas, Ian McLean
Windows Server 2008 Network Infrastructure Design Microsoft Tutorial - Tony Northrop, J.K. Makin
System Administrator Practical Guide - Alexander Kenin
Tutorial system administrator - Alexander Kenin
Python in UNIX and Linux system administration - Gift N.
Programming in Python - Dawson M.
Python 3 and PyQt. Application development - Prohorenok N.A.
Python. Pocket Guide - Mark Lutz
PHP is easy. Let's start with video tutorials - Dmitry Lyapin, Alexander Nikitin
PHP and MySQL - Gisbert Damashke
PHP and MySQL. Beginner to Pro - Kevin Yank

Answer 1

It doesn't matter how you get information, what matters is what interests you and what you like. Choose one direction for yourself and strive for excellence in it.
But what exactly to choose... As folk wisdom says - only your favorite business will make you happy and, if possible, rich. (provided that it's not a matter of cheating) ;)

Answer 2

Your problem is not what you learn, but how you do it.
It doesn't matter if you jump between Windows and Linux or between Python and ZFS.
Learn at least something in the book. At least Python for starters. Under Windows or Linux it works - there is no difference.
This also applies to 90% of other software.

Answer 3

Why vs? As a rule, in small companies, the administrator has to know both. Some tasks are more efficiently implemented on WinServer, some on *NIX.

Answer 4

Came across your question today. Three years have passed. Share the results if it's not a secret.