Going back to school at 41!

I will be 41 this fall and considering going back to school. It has always been a dream of mine to be a nurse. I have 2 daughter who are 6 and 9 and a husband who is very supportive. I have been running my own business but just no longer get the same joy. I’m worried it will be a big change and I will need to adjust won’t be able to work. Maybe just at first maybe the whole time. We would be ok financially just would have to watch every dollar we spend. Am I crazy for thinking of going back to school? Has anyone done this and have advice? I’m an overthinker and just need some advice…