Re: Unions and Hourly pay vs. Salaried
It's a little more complicated than that. While many unions do have some form of "at large" membership, there is limited value in it if you work in a non-union workplace. So whether you join a union or not will largely depend on whether the place you go to work is a unionized hospital. In other words the nurses at the hospital have to have voted for union representation. Unionized hospitals are common in some places - California, New York, Massachusetts, a few others. They are rare to absent in the south and interior west.
As to hourly vs salaried, that's more complicated than you think too. Most staff nurses, which you will be to begin with, work hourly. Being hourly gives you the opportunity to work overtime, depending on where you work, so can be an avenue to more money that way. And in some area, like surgery, one can often take call and make extra that way. Most supervisory nurses are salaried - and their base salaries are certainly higher than most hourly nurses, but there is no opportunity for overtime.
Hope that is helpful.
Nursing News