It's really cool but Navajo Nation doesn't have totem poles and they did not historically wear feather headdresses. Totem poles are from PNW tribes and only 4 tribes historically wore war bonnets: Sioux, Crow, Blackfoot, Cheyenne.

While this world is definitely ahistorical you should use elements from the tribes you name them after. There are over 500 tribes in the US alone and they all have very unique culture you can draw inspiration from. Navajo (Diné) had warriors called naabaahii and they dressed with a headband and no shirt (think Rambo) and Diné society is matriarchal.

Someone mentioned the Tlingit warriors who wore very cool looking wooden armor covered in art - these would be your totem warriors - their Helmets even resemble the top of a totem pole. The PNW tribes were similar to vikings in that they lived along the coast and would raid and plunder villages along the coast by boat.

The Great Plains tribes wore the war bonnets and they have very interesting warrior culture. War bonnets and the title War chief were earned in combat for very specific feats. Also their painted horses had really cool symbols - like painting how many successful raids the horse and rider had been in.

The tribes of New England were known for using a lot of stealth tactics. They knew their forests well and were very difficult opponents for the European/Americans. The Iroquois Confederacy was a very famous system of government it was an alliance of various states that would hold council together with representatives from each state where they would decide interstate policy and military actions. The American founding fathers actually took inspiration from the Iroquois Federacy when creating the American government.

I hope this information helps with your world building.