Your image of Japanese culture, being shaped by anime and manga, i would say is rather blured. It would be like basing your knowledge of American culture on Friends, The Fresh Prince of Bel-Air and the Simpsons. Japanese culture is similar to what they put out in the media, but if Japan is like any other country on this planet, the reality is a flavour different. Unless you have read seriously into Japanese culture, reconsider your ambition of wanting to live there.
Edit: Besides, they are supposed to be a bit xenophobic.
Regarding your Otaku habits, try and find something else that also interests you. However, i would imagine a problem you may face is that you find yourself constantly comparing your new found interest as opposed to manga and anime, bias will set in and you may find yourself not being able to find anything better. In which case, critically assess your anime and manga, find its flaws, be a sceptic and know the weaknesses of Japanese anime and manga. Recognise that anime and manga isnt perfect, and from that explore other medias like gaming, or reading sci-fi or fantasy novels for a change.
Edit: Besides, they are supposed to be a bit xenophobic.
Regarding your Otaku habits, try and find something else that also interests you. However, i would imagine a problem you may face is that you find yourself constantly comparing your new found interest as opposed to manga and anime, bias will set in and you may find yourself not being able to find anything better. In which case, critically assess your anime and manga, find its flaws, be a sceptic and know the weaknesses of Japanese anime and manga. Recognise that anime and manga isnt perfect, and from that explore other medias like gaming, or reading sci-fi or fantasy novels for a change.