If you're interested in your family history and heritage, that's probably what has got you curious to delve further into it. Past life can be helpful, but straight up curiosity and interest is just as binding, so to speak.
There's certainly no requirement that ones heritage be what interests you, either. Certain interests in general, may lead you around. I'm fascinated by predominant horse cultures, such as the Huns, and am fortunate enough to be able to pick the brain of a Hungarian friend. I haven't found any Nez Perce folks, but I do love looking into their culture as well.
I know over the past that I've gone further into the Scottish side of my family, but have been trying to catch up on the Manx side. There's a very strong history of the Norse in the Isle of Man, as well as the Western islands of Scotland, where family is from. Holding to the Norse influence, the Isle of Man was one of the last to maintain All-Things, and was the first country in the world to re-allow women the right to vote.
Just go with the flow. Eventually you will find out why you were supposed to learn it.