So, I’m Lakota Sioux. And for a while I wanted to learn really badly.
What I did was google “learn Lakota language.” And I got all sorts of useful results. There were pages with useful phrases/words. There were pages on how to address other people. There were even a few tapes and books on Amazon on how to speak Lakota.
There is also this school called St. Joseph’s Indian School in South Dakota. I donate to them once a month because they’re a poor school for Indian children. They have a website with a bunch of information. And I bet if you called them, they might even offer a class over the internet or something. It never hurts to ask. You could donate a couple bucks while you’re on there, too. They’ll send you cool stuff in the mail for every donation as incentive. Like return address stickers and tote bags and ornaments and stuff. They also include handwritten thank-you letters from kids at the school. It’s for a great cause.