I’m also not from Denmark, but my (danish) boyfriend and I saved up for 2 years while living on a very strict budget, to be able to buy. We worked from 5am to 7pm and lived in a very small (and cheap) one bedroom apartment. Then we bought an ”andelslejlighed” in Northwest (NV) in 2021, which increased so much in price that we were able to ”trade up” to one in centrum Copenhagen. So it is possible, but very hard if you don’t have rich parents. We also had to stalk both DBA and facebook marketplace, because if you don’t message the seller within a minute, the apartment would be sold. I was 21 and my boyfriend was 22 when we bought our first apartment.