I am sorry to hear that you are in this situation.
And I have to thank my grandmother for insisting that us grand kids knew not only our heritage but at the time ALL living relatives.
And she'd not only have huge family get togethers @ her house or down at the landing of the lake bordering her property. But many times she'd load a bunch of us in her vehicle and we'd go to Paris to so & so's house or Milan to so & so's and Trezvant, McClemmore, and all over West TN. visiting relatives on both sides of my dads family.
My mom's parents also introduced us to the relatives on gramma's side and told us some of their history. My grandfather on mom's side had a sister who lived just across town from us and I spent more hrs listening to her ramble on than I care to remember. But I do have fond memories of Grandpa telling us of our Cherokee heritage in that his mother was 100% Cherokee and his father was a low down pale skin. (that was really about the kindest words he had about his father who evidently did not stick around a pregnant Indian woman carrying his child)
I took an early interest in our family history from this and studied both sides pretty extensively while still in school.
It was sort of funny when I got a call some years later from a historian trying to sell me details on my family heritage that she'd recently discovered while researching it for a cousin and I knew more about us than she was trying to sell us!
(I called the cousin and enlightened her too!)
Yes it is very important that children, adults and people of all ages learn their family heritage! Shoot who knows we may be related to some rich politician who might pay us to stay hidden!