Moving to norway

Hi there..
I am Tunisian , I am married to a Norwegian guy from 6years, we live in dubai , we have a son 4 years old, we have a very good situation here
My son is having a truble in school..so his dad suggest that we can move to Norway coz the school système is better there beside he have a big family in Norway and he will sponsor everything he can send us around 40 thousand nok but he will stay in dubai
So my question is chould  we apply from dubai or we can go directly to udi in Norway to get easier prosses
We are planing to put him in school starting from1st december
Thanks for the help

I am not so sure if norway school system is better.  It is just that it is not as stressful as other asian countries...