Don't worry about finding a job..you haven't even started school yet and there are jobs out there that are not 12 hrs/hospital though that may be the route you want to take. If this is something you want to do, just do it. Seriously. It's never too late, your never too old and because there are going to be a fair amount of nurses leaving the profession in the next 5-10 years jobs will be there.
As far as other posters re: someone leaving higher paying jobs to go into nursing being unwise..well, I politely disagree..I left a 74K job (nursing) because it was soul sucking and the manager was unlike any I had ever experienced. Yes, it was a lot of money, but no, it was not worth the upset - not to me anyway - you can make a lot of money in nursing or a little - a lot depends on the life style you wish to lead and where your happiness lies - for me, happiness isn't spending $400/mo on a souped up cell phone
or $300 on hair and nails, mine is living happy w/family, my pets and getting what I can afford and we have everything and then some we need - this may comes as a shock to some on here but life/work is more than just a paycheck - or it should be because most of us spend a lot of our lives working and living the routine of the day. So make it count for the right reasons - not just the green back ones.