How do you know when you’re ready?

Hi there, my 30s are quickly approaching and I’m really having mixed feelings about having a child. I’m in a good marriage, I have a good job, I’ve never really wanted a kid until recently where I’m like wait… am I actually jealous?? Not that I don’t want one, but more so I’m terrified to have one. The thought of being responsible for another life sounds terrifying to me.

I guess I’m just curious and would like to read some stories of when you realized you were ready or what made you want to start trying?