French, if you're really good at it, will help you a lot with Lebanese. If you know Spanish, it will help will Moroccan. I'm not sure what resources are available in Norwegian, but I bet there's not a lot.

Some background: I studied Arabic for three years in college, and I've forgotten more than I remember. There is a severe lack of English resources on Arabic, but that's been improving since 2001. GLOSS by the Defense Language Institute has some fantastic idiomatic lessons that I'd recommend: https://gloss.dliflc.edu/ ~ most of them are based on real texts. The best texts and dictionaries available are in French because of historical factors.

The first thing that you should know about Arabic is that the 'standard' (fus-ha) is kind of like a lingua-franca between nationalities. Each country and region has its own quirkiness. Here's an example:

زوجة - zow-dja : wife

Because of the large geographic area that Arabic is spoken in, and the enormous history that surrounds it, the above word could also be said as:

جوزة - djow-za : wife

It's a lot like "ask" vs. "aks" in English. The problem with consonant-switching (I know there's a linguistic term for it but I don't remember it off the top of my head) is that three three consonant patterns (in general) make up the base-unit for all morphology

Let's take the classical example of 'to study' : درس

مدرسة : a place for studying (i.e. a school) درَس : to teach

You can see the consistent elements in there, the D-R-S. If you 'double' the R, it becomes more intensified or reversed, from 'to study' to 'to teach'. That is one way of about twelve to extrapolate a verb from its base unit. Maybe you could see why the consonant-switching makes spoken Arabic really difficult for beginners.

I'd recommend A New Arabic Grammar by Heywood - my Anglophone college professor would go through it every year as it's an excellent academic overview.

http://www.amazon.com/New-Arabic-Grammar-Written-Language/dp/085331585X/ref=sr_1_1?s=books&ie=UTF8&qid=1436059900&sr=1-1&keywords=anewarabic+grammar&pebp=1436059905729&perid=10WJ910B3MX9YC1VK4EM