Hallo!I'm japanese. I love manga, too.
I think your dream is very good !
Where do you want to live in Japan?If you want to buy many mangas, you should live in Tokyo. Akihabara is very famous in manga.
However, leaning japanese is very difficult X(
Let's talk with japanese otaku! You can speak japanese soon
I hope you to enjoy Japan! I'm sorry that my English is weak X(