I feel excited and worried on the first day of school, because I didn't know anybody at all when I came to University I don't know where the 13 buildings, but luckily there are people saying this to me.
I was excited and nervous on the first day of class because I did not know anyone when I came to college, I do not know where to Building 13, but luckily someone was telling me to go through this.
I feel excited and nervous on the first day of classes because I don't know anything when I came to college, I don't know where to go 13 building but fortunately people told me how to go this way.