Good on you for deciding to pick up another language but don't despair! Of course science would say that it is easier to pick up another language as a young child when your mind is like a sponge but just because you are a bit older doesn't mean you are 'past it' so to speak.
The key to learning any language is the 3 Ps: Perseverance, Patience and Practice. You are not going to become awsome in a short space of time (unfortunately) but a time will come when, with a bit of patience, it will all click and you will see just how proficient you are in Norwegian.
My answer is to find a method that works for you - audio (including recording your own voice), flashcards, vocab lists, putting phrases to music whatever - and be methodical about it. Constantly review vocab you have learnt and try and practice it - do a bit each day: 5 minutes is better than 0. You may not be in Norway now but a good alternative is to immerse yourself in the language via films, TV and (the most effective in my opinion) Radio. These are also a good marker for measuring your progress as you will gradually be able to understand more and more.
It will be a challenge but don't let the 'oh that's a hard language' talk discourage you. I'm currently learning Chinese, and after 6 months, the 'click' happened for me. Keep at it and good luck! :)