[Hatredcopter]

To speak Japanese fluently would take at least two years of study with a tutor or a class. At least four years studying alone.

To read and write Japanese fluently would take at least four years of study with a tutor or class. It would take a rather long time to do it by yourself...

Anyhow, bottom line is if you need to know Japanese in a short time, you need a class or a tutor.