You'll be fine - trust me.
Besides, if you need help just post here and one of us will help you.
I'm not a Linux genius (although I do know a good bit about OS X, which is based on Unix
), but I've had very few problems (and none by my own fault, mind you
).
The admins are extremely helpful and are there to help you (I'm sure ya'll hate seeing my name show up as a ticket
.)