Stars

I am currently in my 4th day of work and after some briefings etc, I am still seeing stars. I think due to the dynamic nature of the operations here, I am still unsure about how certain things are been done here and thus I am also unsure what I should look out for and be careful on. My peers told me not worry because I am still new and I will definitely take some time to physically do the work and also understand the things better. But somehow, I am still stressed. Am I just impatient??