"Making kids" is fun, duh.
Raising kids, however, can be very challenging in all sorts of ways. Physically, mentally, socially, etc. I became aware of just how much sleep deprivation affected me and for the sake of myself & my family I just sacrificed everything else to ensure I got good quality sleep. Fortunately, I was helped in this and I made damn sure everyone was supported when I was awake.
The whole experience is too much noise and not enough signal to me.
What I've found is that as my 2.5 year old gets older it gets easier and easier for me. The ratio of cool shared experiences to frustrating noise gets higher and higher.
We've just had another child, still very much a newborn, and now that I have something for contrast I see how much harder that was. To some degree the frustration and grind of very young kids had faded into the background of my memory.
The older kid helps though as a concrete vision of what we're moving towards.
Sure there's Bringing up Bébé, sleep training, etc. but sometimes you just get difficult kids at no fault of the parents. And some people are just okay with the chaos of children.
I never learned to be busy. I thought working 60-70h and studying weekends was busy, but that was just laziness-compensation.
Now I know how and the pure joy of having kids can be appreciated. Getting used to that was hard.
So we sorted out that challenge. There are many more ahead.
Every day with children for the last 6 years has been filled with crying, screaming, meltdowns, barely eating any type of food, and what they do eat changes from day to do, exhausting endless requests, so little free time. As a couple, my wife and I barely cope and our marriage is just about clinging on because we're exhausted and scrappy all the time.
I just don't recognise the life that online dads seem to have. I wish I was like them.
Worst though (spoiler), it may have become an even a bigger challenge as they have become starting adults. In many ways they were so much easier in elementary school… <lé sigh>