You can find all of the National race packets
here. Most of the National packets describe just the key aspects of a race, such as make-up requirements, role-play requirements, and other basic stuff; they do not (generally) convey history because that is specific to each chapter's world.
No, there is no National Human Packet. You don't need a National Packet on how to look or act human because you are already human.
... Actually, your character may need some instruction.
Alliance Seattle Plot does not have race packets for Andar-originating characters. To be honest, I am not sure any were ever created.
We do have Culture Packets for the new lands, though. Each Culture Packet describes cultures with multiple races and treat them as one culture rather than an individual packet for an individual race. We haven't yet made those packets public, but we are discussing it internally.
Thanks,
Seth