I worked a level III NICU for 2 years and now work in a peds cardiac icu...its not much different, lots of babies bit some older kids too. Many make it many do not. I've gotten very attached to babies in the past, its hard not too and when they die its tough. On those days however I think pf one little guy I fell in love win. He left the hospital with a trach, vent, gtube and a death sentence...but no diagnosis. His mom still sends me pictures of him 20 months later- no trach, no gtube, walking, eating, completely normal. He remains undiagnosed but when he had left he had been pretty sick and had zero muscle tone. Now he is a completely different kid and makes me happy on those tough days. I will also say, as sad as it is, MOST of the babies who doe, in the long tun, are probably better off that way because their quality of life was bound yo be poor or all we were doing was torturing them and prolonging suffering.
It is definitely interesting all the different diagnosis. And working in a large children hospital I've been able to see all those "extremely rare" diagnosis nursing school
books don't even touch. You should def try shadowing somewhere before making your decision and may've a level 2 would be a better fit for you
Sorry for typos, writing from phone at 2 am is not easy for me!