I have to agree with what's been said. Go through an exchange program. It would simplify things so much. Of course this isn't from my own experiences.
My mum went to Japan in about the mid 70's and completed a year of schooling while she was there, though I think it was only the equivalent of year 11. Mum didn't know any japanese so to spend a whole year there was quite a feat especially as it is nothing today like it was then. For example shop keepers won't hide in back rooms so that they don't have to speak to you.
It might turn out cheaper staying with host families. I'm not sure about programs these days but Mum ended up staying with seven different families.
Anyway I hope something here helped make a decision. Good luck!
