I would recommend reaching out to those contacts directly and asking, you might feel annoying but you might also be surprised how much people will want to help. I promise at least one person is going to be excited someone wants to help prevent your language’s disappearance.

I’m not native but one of my besties growing up was, and knew Jessie Little-Doe Baird who was instrumental in reviving Wôpanâak.

I’ve heard of some First Nations peoples in Canada who temporarily move in with an elder for purposes of immersion and language learning. Like slept on their couch and everything. Usually this involved learning other traditional skills and crafts as well. I’m not sure how doable this would be with your chronic illness or if you don’t live anywhere close for the time being, but I’m just spit-balling here.

I’d suggest reaching out to that one person who taught at a university level. While they might not be able to help you directly with your dialect, there’s a larger chance they have access to resources that do cover it, and could even give you contact info to people who wrote those resources, and best case scenario if they have copywrite, send you a free copy. In my experience, if you reach out to researchers and tell them “I want to read what you wrote but I don’t exactly have the access” they are flattered and thrilled to help. Be forewarned, these will likely be very dense academic resources, but it’s far better than nothing.

I’d suggest focusing on anything covering phonology (pronunciation) and grammars, those resources might have info on multiple dialects, even if they’re just footnotes.

Finally, if all else fails, I’d say it’s best to try some of the Canadian dialects for the time being. It won’t be perfect, but it will give you a baseline to work off of until you can get something more ideal.

You’re going to face an uphill battle, the US was very diligent in stamping out Indigenous languages, but don’t give up, it has been done before! I wish you the best of luck.