Married at 30, surprise pregnancy and a miscarriage at 31, that made me serious about trying for a baby in case we run into issues, to have more time on our side for intervention. Had baby at 33 and then at almost 37.
Wish had the kids earlier, ideally at 28 and 30 or 30 and 33. Physically I was definitely stronger at 28 than at 38 and able to stay nights etc.
Do what works for you, but be aware that the older you get the smaller window you leave for addressing any problems that may come up.
Also, until we had kids, marriage was an extension of dating somehow. Being together for a long time pre-marriage and then 3 years post marriage, we still had to have a big adjustment when baby 1 arrived and it strained our marriage.
There was never a 'good' time to have the baby. I got pregnant right after moving jobs and countries, so ideally I would have waited more, but the miscarriage made me hurry with it.
Just sharing my thoughts based on my specific experience, but these things are different for everyone.