Hello! I had to transfer schools in High school and I was really shy and awkward socially so I really know how tough this must be for you! Especially when you're in for a foreign country too... Don't worry about the accent, most people won't give you a hard time about it, and if they do, just ignore them. Is there a particular group of friends that you hang out with? Maybe getting more comfortable with them can help you to fit in better. And try to calm down... Usually we start becoming hypersensitive to what's going on around us when we're really anxious or uncomfortable, so don't get too stressed up about it!