I think there are 3 ways to start to learn Japanese. 1.Interested in Japanese culture 2.Necessary for your business or studying 3.Making many Japanese friends All these ways are probably the same way as you have learned your native language. 1.When you was a child, you were interested in everything. So, you could learn your native language. 2.When you was a child, it were necessary to survive. So, you could learn your native language. 3.When you was a child, you tried to made many friends.So, you could learn your native language. I think, you can learn Japanese by the same way as you could learn your native language when you were a child. Hearing, reading ,watching and using are important to learn any languages , I think. (So, now I am using English language to learn English.)

no idea at all sweetie

I think you have to make Japanese friends^^ Are you interested in Japanese culture? In that case,please you watch TV and listen to music.

You must get "Nippon" friends

Ask at the university.