Sherry,
Welcome to WikiTree! George is correct - you need a paper trail and that is achieved by beginning to add your ancestors to your tree. First, your parents, then grandparents and continue on back. Eventually, you will probably find that some of your ancestors are already entered and you can just connect to them in your line of ascent. Be sure to source each profile that you add to be sure the information on it is correct.
It really does not take too long before finding others that you are related to and you can message them and collaborate on your common lines. Take it one step at a time until you find those gateway ancestors.
Be sure to come back to this Forum and ask when you have questions. Good Luck and I hope you enjoy the journey!