Any Tips On Going To Japan?

Question:

When I'm 16 I plan to enter the foreign exchange student program and go to Japan for a year or so. When I'm 18 I want to move there. I've been planning this since I was 5. (I'm not kidding!) I started learning Japanese when I was 9 then I stopped for a while and started again when I was 12. There is still a LOT I don't know! So I would appreciate some Do's and Don'ts! Any tips? Thanks. I also want to know if I would get bullied and if you think any guy would ever date me? Thank you!
(If it matters I'm 5'5 with dark brown hair and blue eyes and I weigh 125lbs)

Answer:

Do not tip at restaurant or other places.
Do not talk on cell phone on train or bus.
Let passengers exit first when you are about to get on train.