I had friends 40 years ago in their early 20s that were adamant that they never wanted kids. Some of them stayed that way and are going into retirement childless and most of them are happy with their decision. A few aren’t but can’t do anything about it. The others discovered, that with with right person, they did want kids and are just as happy. Hard to say which you will be. I know a few young women banking eggs in case they change their mind 10+ years from now and want to have biological children. Can you bank sperm to hedge your bet?