Welcome to Sandaker. This is a calm neighbourhood with worker class apartment buildings from the 50s.
This ad is for my entire place. It's about 56 m2 and has two bedrooms with 120cm beds. I also have an air mattress you can use.
I live in the apartment on my own although I frequently travel for work. When I'm at home you can rent just this cozy room: https://www.airbnb.com/rooms/17382239.
I'd be super happy to help you out with anything Oslo related!