Need Help With A New Belief Using The Thought Ladder

Hi, I’m 52 and have this deep rooted belief that I’m not an adult or successful because I don’t own a house. My goal is to live in a house someday but in the meantime I want to be kinder to myself and I’m sick of beating myself up because I live in an apartment. This thought came from my mother who equated self worth with having materialistic things. I tried a new thought but my brain is arguing with me and doesn’t believe it. I’m having a difficult time coming up with a new thought that my brain will believe and need help. Thank you