Its a first job after Uni, you'll learn a lot in your first 2 or 3 months. Fixing computers in a business environment is different to tinkering around fixing single computer.
Welcome to the joy of figuring out, what people are saying and what they actually mean, also the AD / User Manager / Server Manager, something most people commming into IT have not really experienced before.
The first 2 or 3 months will be fun, after that, 90% of the calls you take will be the boring access to groups / restores / forgotten passwords, but this is all footwork and time that we have all gone through. Treat the Job as your first step on the ladder, after you have 12 months experience you can start looking for better jobs, 2nd line normally reqire at least 2 years in business support area, the hard step is going from 2nd line higher.
Have fun with it, and don't listen to people say that they wouldn't do it for that much money, we all had to start somewhere.
EDIT: How stupid of me to miss it, congratulations