Earlier quoted context omitted.
Get your health right first. Your side project will always be there, the time you spend with your daughter will not.
Unfortunately being first to market is key (I think). But yes, you're right, she is already changing so much everyday :-)! Either way, I need to find a better balance, is 3 months too young to teach her to code?!
How many real-world examples of first-mover advantage can you find?
I think that the advantage might not be as great as you'd think.