High school help?!?

So high school started yesterday & I know it's way too early for me to be saying this but I really don't like it. My teachers are all super strict and mean and all the students are unfriendly. I have friends in some classes but they sit super far away from me and I'm surrounded by the mean popular or the immature boys. It's horrible. In class everyone talks to their new friends and I'm just there sitting not knowing what to do because I'm super shy. Also in lunch I sit with friends but I'm so quiet I just don't know what to say. I also feel left out in my classes. Sorry this is long. Thanks for any help. :)