Hi,
I would treat it as an adventure, at most it will be 2-3 weeks out of your life. Can understand how you feel though, if you are nervous maybe go on a weekend break to get an idea of what it's like.
As per the other comment, I was terrified too and when I got to the Airport I almost walked back out, but for me it was about all the wonderful places I was going to see and that kept me going. It is so well organised and you can still have your own space if you want to.
Debbie