Since I went through the process of being a new Luger collector within the past six months, let me give you some of my thoughts at random:
--- see if there is a forum member near you- there should be several in Penn. These guys are fantastic about sharing their wealths of knowledge with us newbies, and someone will probably sit down with you to go over a lot of the basics, and possibly show you some of their "babies".
--- get some books. I started with "The Luger Book" and "Lugers at Random" which are both very helpful.
--- look at some websites like Simpson's to see the great variety of Luger variations that we're faced with. Prices are overboard, but good pictures and descriptions to study.
Good luck and good hunting.
Bill