A Sunday night shift in a Nicu in south Brazil

You are a great nurse, excellent. Nurses should work abroad to appreciate their home. I don't work any more, I am retired, but I too started nursing school at 17 and worked for 40!! What you described in your post reminds me of what it was like here when I first started nursing. As third year students we were in charge of the evening or night shift, sometimes with one LPN nurse, no nursing assistants, in a medical or surgical ward of 40 to 50 patients, or even in the ER. Today it is different, thank God. Students have tutors to work with, they are not in charge even when they graduate, not to speak of different ratios of nursesatients.
You have to be proud of yourself!!