Learning Norwegian has been on the back of my mind for a few years now. I've visited Norway 5 times so far (I'm in Trondheim right now) and while everyone does speak and understand English, I am of the belief that you can never truly understand a country, its nuances and the local culture unless you learn the language so not knowing anything more than 3-4 basic words in Norwegian is a bit frustrating because I can never properly interact with anyone.

For context, I live in central Europe, I'm 30 and I already speak 5 languages including French and English. I do speak and understand German too but I'm far from fluent and I don't intend on becoming fluent in German. The only reason why I can understand some things in written Norwegian (and usually no more than 1-2 words in a complete sentence) is because I know German and there are some similarities because they are both Germanic languages. So where should I start and what should I do if I want to learn the language properly and as soon as possible reach a certain level of fluency? I'm also afraid that at my age, I will be "too old" to learn Norwegian properly. Everyone knows languages are best learned when you're much younger.