I had my first day yesterday at my new Help Desk position which is my first IT position

. All I can say at the moment is wow! First off this is a smaller consulting company with a fairly large workload, it is pretty much me, one other help desk guy, 2 field analysts and a senior analyst. Yesterday was more of an orientation than anything but because this company is so small, I am covering A LOT more than I had expected, which is a good thing, just overwhelming on the first day. I will be taking on the role of network admin, help desk, and just all around odd job guy. I have been given access to the server room and pretty much told that if there is a problem its up to me to fix it, again, these are all very good things...just a bit overwhelming at the moment, I'm sure once I get my groove I will be fine. I was sent an email from my boss today telling me that the job board is 60% full and half of it is mine...I think I'm being hazed...but hey, I'll take it!! I'm going to get more technical today so I will let you guys know how that goes.
I am not complaining by a long shot because I am aware of my current position, but at $12.25 an hour I do feel a bit underpaid given my responsibilities...is this feeling justified?