Help with Indigenous Worldbuilding.

I am writing an alternate history project with magic, and I have one particular story I want to write, set in Atlanta. The problem is, that colonization never happened in this world, meaning that the Muskogee people still live here. I don't know much about Muskogee culture, and I have done some research, but I don't want to appropriate Indigenous culture. Any advice on how to write traditions, names, et cetera, would be greatly appreciated, especially from Indigenous writers.

(While writing, I forgot that it happens to be Indigenous Peoples' Day! What a coincidence!)