Test Accuracy

I want to do an ancestry test, and I’m really interested on AncestryDNA, but I’m concerned about how accurate this is when it comes to American Indigenous ancestry, I’m from Guatemala, but I know my ancestors were Xinka, a group that had nothing to do with the mayas, and when I receive the results, I don’t want to receive a generic thing like “Americas Indigenous” or smth, bcz thats kinda obvious by just looking at me lol