Being A Foreigner

I would like to know what is to be a foreigner like.
I have been to several foreign countries but all of them were short stays within one month.
Being a foreigner in some foreign country is my aim to be achieved.
If I don’t go abroad and stay in Japan in all my life, I will definitely regret my life after getting old.
Since I work as a teacher now, teaching Japanese language overseas is a reasonable option to migrate.
Living in Japan is comfortable, but I want to put myself in a challenging environment.
I will look for more job opportunities for the next school year.