Is it normal to be scared and nervous all the time in your first job?

I'v been training for 2 days as a waitress in a Japanese restaurant, and this is something else. Some people might not think this is a big deal but this is the first time I've ever worked, I'm 17 and in this restaurant they expect you not only to waitress and bus tables but you also have to prepare the food which I thought is the Chef's job. I'm expected to memorise the whole routine and the Japanese menu in a day and all the rules etc.

I'm always nervous and jittery because the manager is very strict and I don't want to make too many mistakes.

And I also don't have a very good memory, it takes a few times of someone saying something for me to really remember it. =/

Does any body else feel unsettled and uncomfortable in their jobs?