Mary, welcome to WikiTree!
You are related to a whole lot of people - your parents, grandparents, and great-grandparents, for starters. If you add their profiles to WikiTree, then keep on going back, you are very likely to find a magic moment when you try to add someone and a note pops up saying that person already has a profile and offering you a chance to connect to it. At that point, you will have connected to the main tree and (give it 24 hours for the connections to update) you will see everyone that is already connected to that relative of yours.
