Hi OP, this is one of those things really no one can help you decide - it’s down to you and your Dp. Please take your dp’s views fully into this picture - it’s so important not to emotionally guilt-trip a partner into letting you conceive again.
I had a second baby late in life (43), my mum had her last baby aged 40, and my gran had one child at the age of 23 and her second aged 37 (big gap due to intervention of WW2 in killing her first husband; her second husband was 49 when his child was born). Being an older mum is easier than it ever has been in the past - great medical and social advances to thank for that - and MANY women had kids in their 40s throughout history. But you now have the advantage of choosing, not just falling pregnant because of a family planning failure.
You have to be prepared for failure to conceive.
DH and I decided we wouldn’t go the ivf route at this age personally - We let nature take its course and agreed we would stop trying after 8 months and give up. I was pregnant in three months, similar to my first child. So also don’t be surprised if that happens quickly too!
And you should know what you and dh would do if your foetus has a serious abnormality - late abortion is a difficult thing. Or you have to consider the impact of raising a child that has a disability of some kind - it could help if you’re financially more secure, but hard if you are both hoping for an independent child aged 18.
It will be tiring, that’s for sure. You’ll have to “stay young” in mind and body, as long as you can, and this has to be a conscious approach you can’t take it for granted.
On the other hand, in my family so far we have been pretty blessed. Natural conception, easy pregnancies, kids healthy, all parents have survived long enough to see their kids reach adulthood. I would like to live healthily until 65, which doesn’t seem an unreasonable hope, to see my son into adulthood.
Families come in all shapes and sizes and the pros and cons of older parents will be endlessly debated, at the end of the day only you and your dh can decide.