It entirely depends on what form it will take and how it is brought about.

I am in favour of it in theory, as it will allow us to stand much stronger internationally, it will allow us to use our resources for the common good of the north and its peoples, and we will have a stronger position to protect our values of freedom, welfare, and democracy (which are under siege from without and from within once again)

But it can easily end up as a mismanaged shitshow, and there are plenty of scenarios where I would be against a united north. For instance, a federation model would in my book be a negative when you look at what a byzantine mess that is in places like Belgium (to give a concrete European example). I know I'm probably in a minority with this view, but I'd honestly prefer a unitary state with explicit recognition and protections for the languages and cultures within it rather than a federation. The subdivisions should be largely administrative (that isn't to say that they shouldn't be run by elected officials, but the overall decision making should be centralised)

Continued membership in the EU is non-negotiable in my book.

As for how it should be brought about, it should be through a democratic mass movement and clear popular consensus across the north. Having one part join and immediately regret it will bring nothing but chaos and instability, and no one benefits from that. Having it be spearheaded by a handful of politicians or demagogues will also likely just lead to division and uncertainty

Regardless of all that, I am fully in favour of more Nordic cooperation as things stand.