Norway – Can I travel 100% safely with only my identity card from Romania to Svalbard?

This is my first trip out of the country, I had never been on a plane before … and at the same time, I'm leaving alone. I am so scared and worried and try to do as much research as I can. Many sources say that I should be able to use my ID card, but our ministry site still recommends a passport, which is stressing me. A passport is not free and I do not want to spend money.

So, is there a 0.0001% chance that I will be arrested because I do not have a passport?

Yes, I read the message of the Dutch identity card before coming here, but it's not the same thing, at least that's how I see it. And I want to make sure that it works for my country too.