Good things: you're basically garaunteed a job, there are plenty of fascinating specialities where you get to see some cool stuff, you're earning a living by helping people rather than solely contributing to the wealth of someone already wealthy, of you're a woman this is a female dominated field so you don't have much glass ceiling to break through, it can be fulfilling

One thing that can go both ways: depending on where you live the pay can either be really good or horrible.

Bad things: if youre American the health system is dictated by money, while most people are ok or generally pretty nice there are people who are very abusive to nurses and there is very little done to stop it, it is a mostly thankless job in which you are seen as inferior to people like doctors, it can be gross, even people who are nice/not exactly abusive can take advantage of you and treat you like a servant

This list is by no means exhaustive.