For being System Admin

I am a wordpress developer. I have very little knowledge of PHP. I like PHP but I want to be a system admin. For being system admin, I know I have to learn much about cloud computing, Linux and windows server. Can anyone guide me on how to be a big System admin?

@shiplogy start by setting up some Linux servers in your home and try setting up things like DNS, Apache, an email server, SSH, NFS, Samba, etc… You can use ANY old desktop or laptop as a Linux server.