@kolpevibeli I’m 28 turning 29 this year and my wife is pregnant with our first.
My dad is turning 70 this year so he was 41 when he had me. He was/is a great dad. Always present, always supportive, always involved.
I will say I think a core component to his greatness was that he has always been super fit. He trained in martial arts extensively and always took his health and fitness seriously. This meant that as he aged and we grew up he was able to keep up with me and my two younger brothers. Be it wrestling as a kid, playing at the park, backpacking and kayak trips, biking the neighborhoods whatever we threw at him he always had the energy and drive to be there.
It could have been a vastly different experience if he was out of shape and overweight. Not because his love would have been less but because he almost certainly would not have been able to keep up with 3 boys at 50 or young men at 60 where we were all wanting to go on multi day kayak trips, backpacking, trips, parties, support all of us in our extra curricular, need help moving into university etc.
And now my dad is 70 and his first grand child will be born and hopefully he has many more years ahead of him but because of his dedication to fitness as a young adult and beyond he will be able to (almost) keep up with his grand daughter from new born to many years to come.
So I will say it’s not too late at 39 or at 49 but you have to have the drive to prioritize your son not just as a dad being present but prioritize your health and fitness so that you can be present for all of his life milestones. Being able to take your sons child for a weekend like I am sure you would want your parents to be able to do for you etc.