One month of dating.. baby talk

So I’ve been with my boyfriend for almost two months. We are both almost 30 and are both aware that each of us want a baby/babies in the future. I already have a four year old that isn’t his (obviously)

I just keep racking my brain figuring out how to ask him exactly how long he would want to wait before wanting a baby? Should this be a question I should ask? Don’t get me wrong, I don’t want one right away obviously just am curious about the time frame. I’m so tempted to just ask him via text right now but am afraid of the response. What do you guys think?