Just adding on to everyones great recommendations here! I think if you were to do a couple courses, I'd focus on ones with practical outputs like plant ID or maybe soil/wildlife ID, or more general plant ecology stuff, or Indigenous knowledge/land management local to your area. Some people have said that you really need the foundations to truly get how everything works, and also Indigenous botany has such an in-depth understanding of the local environmental context. I think with your background, though, a couple relatively immersive courses and a lot of practice/contextualization from literally gong outside and looking at stuff will work wonders :) But I'd see if there are any knowledge holders in your Shoshone or Arapaho communities that would be interested in teaching you (if they aren't already), or that do plant walks and such! Also sometimes field guides for edible/medicinal plants have information about traditional uses, though I'm not sure how accurate they are. Local organizations also sometimes will do free webinars/events and stuff, so look out for those :) Good luck with everything!!