I am thinking that I want to be bilingual or trilingual through international travel.

in this September  a week in Thailand
in this October 2 weeks in Europe.


I had learned English since 13 years old to 18.
but I cannot hear what native says.


because I had learned for college entrance exam.

and It is difficult for Japanese.
Japanse language is atypical comparatively. 


Although if I can not speak English all ,they should have nothing to do with me.


Please advise me the best way to learn English.