Hello!Jack!Welcome to China!Don't be worry.I think you aren't so stressed out.You must believe yourself.You should say "hello" to classmate when you go to school the first day,and you should talk about yourself.We both are Chinese students,and our English is not very good.So,you can help us with our English,and we can also help you with your Chinese.It's good for us!You will get on well with our.You can take part in some school activities like art festival and sport meeting.And I think you should learn some Chinese conventions.Becouse if don't do it,you won't get on well with our classmate.