I have to learn and develop a web interface in Perl that will just go get the size and the creation date/time a set of folders on a Windows Server (2012 r2)

Have you read perlintro? Start there, because without the basics you are going to sink very fast.

Your task is actually 3 tasks:

1. Connect (by some as yet unspecified protocol) to an alien (Win32) server
2. Retrieve various FS data from the alien server
3. Put a web interface on it

Do these one at a time - ideally in the order above. Consider using Modules for separation of tasks. And always, always use strict and warnings.

Good luck, especially with the Windows bit. That will probably be the tricky part.