Ancestry–my family history?

Most people know their ancestry, or at least some of the close stuff. You know your father and mother, brothers, sisters, aunts, uncles, etc.  I’m adopted so none of that is easily known. I’ve never had any type of drive to try and discover my ancestry. My father and my mother were the ones that raised me. I’ve known that I was adopted since I was a little kid.  Nothing was ever hidden from me.  In fact my mother wanted me to search for my birth mother a long time ago. Just never had the interest. ■  A few months ago Holly and I decided to purchase AncestryDNA kits and find our genetic heritage. ■  The test showed I’m 84% - Scandinavian, 11% – Great Britain, 3% – Irish, and 2% Finland/Northwest Russia. ■  More than that I’ve discovered that I’m genetically linked to 147 4th cousins, or closer. My mother found my birth mother’s first and last name.  With that information I think I’ve located her.  She’s still alive and 85 years old. ■  Now I need someone to look at my research and tell me if I’m right, or wrong.  If right, then how do I contact/approach her.  Phoning is one way, but she’s in Fargo, ND, so it’s a long drive.  And I’m not even sure that I should be the one to approach her.  ■