Been there and done that. Quite frankly, I don't know how I survived the first few months or year and I was already into my 40s which didn't help. ....got progressively back to a normal state after about 2-3 years. It's much better when they can communicate, tell you where it hurts, follow directions, etc. ....a lot more fun too.
I think I stopped gaming for the first few months after my son's birth and even cut cable TV once I realized we hadn't watched it literally for 3 months (stuck with Netflix and Prime).
As Creed said, don't be afraid to ask for help. I actually semi-retired over a year ago just as a quality of life decision. I drop off /pick up my son from elementary school, help him with his homework, etc., etc. It was a great move for us and my boy is so much happier and less stressed than when we both had full time careers. After 30 years in tech, I got tired of the corporate grind anyhow (my wife still enjoys it). I have some welding projects I'll be starting once the weather cools down so that will help keep me sane and maybe even help make a little scratch on the side.
I hope it all goes well. If you have family that can help you guys take breaks, that will make a world of difference. .....trust me.