At what level do you need to learn it, user, administrator or installer?
PTC offers training classes for the first 2. You need to learn and document what it takes to install and configure a Windchill system.
If you have the software and licenses, start by doing an install, follwoing the steps in the PTC manuals. Docuemnt what you do along the way so you fully understand what you did. Then remove the software and do it again to be sure you recorded every step and command entry.