hello,
idk, this might not be the most "popular" opinion ... especially here on HN, but imho.
keep the stable job and start to appreciate your family - especially your newborn child.
time flies, and you never get back the time you are missing out with your growing child - ever!!
and this is much more rewarding than getting some stupid startup off the ground - and be serious to yourself: statistically you won't have a lot of success anyhow ;))
just my 0.02€
v.