you will be fine, and there are heaps of people you can call and there is here that you can vent etc.

My sister offered to do some baby sitting when I go back to work. (she has 2 littel girls) and says to me if you have a boy I won't know what to do. I was like neither will I

We are all in the same boat. Even child care workers that around babies lots still have some struggles and fears at the start.