My advice is to recognise when your hormones are shrieking at you to procreate!
Mine did, to the extent they drowned out everything else. Including a perfectly capable brain. They didn’t quieten down for another 5 or 6 years, by which time it was too late (had had 2 DC).
I distinctly remember a feeling almost like coming to after losing consciousness. I looked at my life (who is this man? who ARE these children? where am I living and what happened to my life??!) and felt genuine shock. For around two years after that, I felt what I eventually admitted to my DH to be resentment. I resented my body and my hormones for the changes to my life, which I had LOVED. Which caused huge arguments, as he had never wanted children. And, honestly, neither had I really. Would have been fine to have just carried on as I was.
Now, however, with my children growing and separating from me inexorably and as they should, I’m grateful. And so is my DH. They have made our lives more interesting, richer, deeper. I feel connected to a swathe of humanity that was foreign to me when I was child free. I’ve felt new emotions, learned about myself, been tested and challenged. I’ve also gained a lot of weight, been in and out of hospital, aged prematurely, so there’s that too…
Seeing how things go is as good a strategy as any if you’re not sure BUT never forget that your children won’t have asked to be born. That’s all on you. They are your responsibility and you owe them, at least until they’re mature enough to suffer the consequences of their own actions (could happen at 16, 18, 25 or 45 or never, depending on how you and they turn out).
In case it’s not clear, I have never loved anyone or been loved by anyone as much as my children. They’re pretty much the best thing that’s ever happened to me. But, it has cost me a lot of time, energy, money, health, wellbeing.