Michael, there is a lot of information here on the forum, plus book recommendations and book reviews.
Right here in this part of the forum
http://forum.lugerforum.com/forumdisplay.php?f=133 is a lot of 'stickies' which are postings that we felt were useful for beginners. Be AWARE that some books are cheaper and easy to get and are not very good books...
Most people buy a luger and go from there. Some people have 'extra' money and buy, buy, buy and end up with 'pretty' guns that may not be accurate or correct.
One thing is to figure out if you want an 'example' or you want an 'era' of luger(s), i.e. commercial, WW1, Weimar, WW2, etc.
Ed