It’ll be fine. You’ll be in good hands and they will guide you through what they are going to do and what happens at each stage. All you have to do is turn up in the right place at the right time. I also think good hydration is important up to the point you are told to stop drinking.
I am one of the least brave people I know and I got through mine just fine. If I can do it, anyone can.
We’ll be thinking of you all the way.
Very best wishes,