Just to clarify,
I haven't asked a rabbi, I'll try to maybe and post the response here, but I was just reading this and didn't want people to read this and have misconceptions.
It could be that there are different opinions, but
Halachically there is ZERO issue with a girl making kiddush, hamotzi or havdala. Havdala is a little trickier as there are some brachos (I think it's meorei haeish?) that is a man's bracha so what is a female meant to do when making havdala, say it, or not. There are differing opinions on that and different people do differently. With kiddush - I know many seminaries that the girls there make kiddush on their own. Both Friday night and Shabbos day. How it works is that one person is motzei the rest of the people.
I'm happy to hear different opinions on the matter if there are any, but, as I said, I just didn't want people to read this thread and think that they have to wait for a man when there is no reason to (of course unless you are following an opinion that holds differently, but definitely a good percentage, if not the majority, hold as I wrote).