BOY!! ??

I don't know why I'm feeling a little unsettled about having a boy. First I was like either one I don't mind but now that I know we're having a boy I'm happy because I know we're having one of each now, but it's so unchartered territory and I don't know what to expect! We have a 6 year old girl, I come from a family of mainly girls. My sister does have 2 boys and a girl but I guess I don't know what to do with a boy. I'm sure it's the nerves and I'll get over it soon. I was thinking about circumcision. I'm like whaa?? I thought it was painful and unnecessary and my husband is like oh no we have to do it, so I'm like ok whatever you want. I guess I'll be ok, boys are so mysterious to me right now. I'm sure I'll get over this boy insecurity/phobia/fear. Has anyone experienced this?