Nervous? yup. Scared? not really.
Behind the airplane?? Oh yeah!!!
First ever flight on a commercial airplane was Zürich-Munich in 2001. Snowing and an ILS more or less to mins. But pretty easy and after a couple days of handholding by the training captain (as they are known over there) and I was a seasoned veteran.
First flight in the US was ORD-MSN and I was neither scared nor nervous, but a bit confused because of how things operate differently in the US vs in Europe. I was very excited to fly into Wisconsin because that is where I grew up. Unfortunately I hardly ever got to fly to Wisconsin anymore...
Again, after a couple days it was old hat.