Do you think my chance to have a 2nd (and last) child is still possible or is one good enough?

I've been married since Sept 20, 2024 and our son was born on May 15 of this year. During our engagement, we had a discussion that two kids (if possible) would be ideal.

We still would like to give our son Kenneth a sibling. It would be great if my 2nd child was a girl but I don't mind if it's another boy. Though realistically, the older we get the lesser the chance of becoming pregnant right away and the risk of birth defect increases.

I know my maternal grandmother had my aunt (her 3rd child and last one) at age 41. That was her 3rd C-section. She's now a healthy grandmother herself. Though not all cases are successful like her. Our boy was born through an emergency C-section as a result of my water breaking. The induction was unsuccessful, my baby's head was too high and he would've contracted infections if they waited more.

Here is the issue:

I went for check-up today. I was informed by the OB and nurse that normally after a C-section, the waiting time to try conceiving again is 3 years as I should let the scar heal. I still feel some numbness in the incision site whenever I touch it. However since I'm already 38 and my husband is 51, they said we can try conceiving after 2 years. I would be 40 years old by then. Even though I got immediately pregnant (for the first time) during our engagement when I was 37 there's still a difference between 37 and 40. I have to admit that apart from the C-section, I never developed any morning sickness. Though not all pregnancies are the same. They told me that due to my age and also the fact that I had a C-section, a 2nd pregnancy would be a high-risk pregnancy for me.

What do you think? Would I still have that small chance for the 2nd and last child (and hope I get lucky with another healthy child) or leave it at just one child?

Updates
9 mo
We would've been able to conceive after a year or less if I would've had a natural birth but it was C-section and that requires a longer waiting timeframe.
Do you think my chance to have a 2nd (and last) child is still possible or is one good enough?
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