Board Thread:Warhammer 40k General Discussion/@comment-7855563-20130411210612/@comment-3580035-20130412034759

Codex: Space Marines is the best starting point for loyalist marines and chapters of your own making. If you can, also go to your local GW store and ask them any questions you want (and also try and read snippets of the rulebook every time you go there; it saves you having to buy it).

Luna wolves would probably best be themed around the Forge world book, but thats a little advanced. Best to make a normal 40k army, get to learn the ropes, and then think about what to do from there.