Scared about studying abroad

Hello,

I'm scheduled to study abroad from February 20th - June 20th at dongguk uni this spring semester and am scared shitless. I was supposed to go with a friend but she bailed super last minute on me and now I'm rethinking going. I'm a super shy person and all of this is giving me anxiety just thinking about it that I feel like vomiting. It doesn't help that I'm the only person from my college going either. I was supposed to book an Airbnb with a friend too but now I have to get one alone. I could really use some reassurance and advice.

Thank you, A super scared person