I am an English boy moving to the USA.?

I am 15 years old and currently live in Leeds with my mum, sister, and step-dad, but my step-dad has a new job which is based in Arizona in the USA. I am kinda worried about the move there because I will obviously have to attend an American school and this is something that concerns me cos of my English accent, and the whole coming from a different country thing cos I really do not want to get bullied in any way. What should I do to avoid this ?! I really need help! Is there also anything I need to know about living here in realtion to peoples attitudes and style ?!