Na, this is all New Age nonsense that was made up pretty much wholecloth. You can't learn traditions from books. At least you have political affiliation with a tribal nation, that's good. So, perhaps look into your greater tribal community if your elders are gone. It is just a big extended family anyway.
There are still quite a few tradish Creeks around. If you approach them and clearly state who your family is and are patient and show an interest, it shouldn't be hard to make friends and maybe start participating in tribal events and ceremonies. Well, if you are around Oklahoma that is. If you are outside of that area, it will be more challenging to make these connections.
My advice is to just stay away from the New Agy stuff. And by the way, your "heritage" is what was actually passed down from your family and tribal community. If you didn't get much passed down, that is just the way it is. My family is all Christian from many generations ago when they were converted by missionaries. One of my ancestors was the first in our tribe to be baptised by a missionary, in facct. He grew up to be a preacher and converted his fellow tribesmen. Ironically, nowadays a "tradish" person can be one that uses the tribal language in church services. Many of the old beliefs are gone. You'd have to actively seek out those that have kept the traditions, but they are still out there.