I am learning Italian with a "Rosetta Stone" course. I donīt know if it is available in Norwegian....it is in Danish and Swedish, so perhaps. Seems to be very good. Donīt worry about the "rules." Grammar to the nerds..... he he Learn like you did as a child....by speaking, reading and writing simple things and getting more and more complicated.
When you already know what you are doing, you can apply grammar, but your learning will be faster and more correct with good role models.
And that is the Rosetta Stone approach. I (ahem) "might" have got my copy through pirate bay......then again, might not have.......Whatever your conscience can handle......Then when you get to Norway, tell everyone you are from Hungary and speak no English. Otherwise, they will speak English and you wonīt learn anything!!!! Good Luck! If all this fails, find a new girlfriend! he he..........just kidding....it will go fine!