It was damn hard for me at the beginning, much worse than I'd imagined and I imagined pretty bad. I just ended up sitting in my room most of the evenings scared of talking to my flatmates :/ So i missed out on a big opportunity to make any lasting friends. But i'm so glad i went, i've learnt so much from the experience and my SA has got better and better. Go for it and don't let SA control your life, try not to even worry about it and tell yourself that when you get there you'll just take it day by day (that was my biggest problem, i just didn't see the light at first until i learned how to live in the moment a bit more)