Need help knowing what to put on a baby registry

Hi I’m a 23 first time mom, and I’m struggling to know where to start with creating a baby registry. I don’t know what to put on one, and I was wondering if anyone had a list of things I should put on a baby registry. I know diapers of course, and I know I’ll need a car seat and would appreciate any recommendations on those as well as anything else. Thank you so much