Well, I'm not Norwegian but I'll chat anyway.
I've been going to anorway ever since... I was born I think?? This is mainly due my family in Norway. Honestly, I'm not complaining!
Norway is honestly an amazing and such a beautiful country. Whenever I go, I always stay in Oslo. I've seen the Northern lights in Norwway before, although it was only a glimpse as i was in a rush. I saw it clearer in Sweden though! (Again, family).
I've traveled back and firth between Sweden, it don't take that long tbh. Maybe 45-60 mins. It depends on traffic I guess.
Oslo, is a really cold city. I'm saying this because, normally, every time I go there, it's winter time. This Summer will be the first time I go in wam weather for 2/3 years.
Hope you had a nice time!