Concerned about raising a singlet.

Taylor • My husband and I are excited to meet our little boy (#1) in September!
I'm a twin, so obviously grew up with my sister. Through most of our life I relied heavily on her. 
It's occurred to me recently, while watching DHs cousin play alone, that I have zero experience in this. I guess I'm just looking for a little support. I know I'm going mother just fine. I just have to figure it out as we go.