Shortlisted for new job position...nerves!!!!

Hi there
I don't post much on this board, because I don't usually have anything interesting to add. But, I applied for a new position at my work, and to my surprise, I have been short-listed for testing. I will be tested on Word, Excel, Adobe Design, two typing tests, a written test, and then later, a computer system called "Class". I am so scared...and I don't know these systems that well! Eeeek!