Yup. I cringe at the thought of my first attempt at a novel that I wrote back in high school, which suffered from a ridiculously stereotypical black character.
I still don't feel confident enough to write the full-blooded Native American perspective. I've only just gained the confidence to write the halfbreed experience.
I'm half white (is there really such a thing?) and half mi'kmaq and my advice is DON"T!!!
Write what you know it'll be more believable.