Divorced but still wanting s baby

Divorced in January but still wanting a baby of my own. I’m not ready to be in a relationship but emotionally and financially ready to have a child on my own. I want to find a sperm donor and start my family! I turned 30 this month and I’m not getting any younger. Is it selfish of me because I never gave my other half a child and may never have another parent for my child if I do this??? 🤔😭