Flames of War - Overwhelmed By Overlord & Atlantik Wall

As anyone who pops by here regularly will know I've recently been painting a lot of tanks and other minis for flames of war.  I've played several small battles and have been expanding my mini collection in a quite random way.  I decided it was time for a bit of structure and managed to get the 'Overlord' and 'Atlantik Wall' sourcebooks on the Normandy invasion from ebay at a good price (£30 for the pair, when normal RRP is £30 each).

I was expecting something akin to a 40K codex book (which retail at the same price), but boy was I wrong!  Whilst these have the same RRP as a GW codex they completely blow them out of the water in sheer size of book and quantity of content.  The quality is pretty amazing too, each book contains many, many lists representing all the different formations that fought in the campaign as well as loads of historical detail on the formations and a whole bunch of historical figures that fought in Normandy.  The books are hardback, have a bigger footprint than a GW codex and come with a much more substantial page count (240 for Atlantik Wall and over 300 for Overlord).

The problem is it's almost too much information, I really don't know where to start.  It's difficult enough trying to find formations that work with what I've got, let alone thinking about future additions.  I can see why it's done this way, but part of me wants an all singing all dancing 40K style list which isn't based on any particular historical formation.  Hopefully a bit of time and a lot of flicking through will help me make sense of it all.