Twins... I'm scared

I'm currently 9-10 weeks along.
We found out we were having twins two weeks ago.
I'm so scared out of my mind. There's so much I don't know and I don't even know where to start.
This is my first pregnancy.
My SO is more calm and excited about it than I am.
I outwardly have it together most of the time but SO knows that internally I'm so confused and lost!
Don't get me wrong I am so excited. But I just don't know what to do! Where do I start?