Hi AK,
First of all, its very nice to see a "career" discussion. Considering that lost opportunities are one of the main scars of spending time on JWs, I'm bothered that networking and career rebuilding conversations are not more prominent.
Secondly, about me so you know where this is coming from: Born and raised JW, left at 29 years old, became a Paramedic/Firefighter, used that to get a AA, then AS in Emergency Medicine, and then on to a University as a double major in Economics & Sociology. Like you, I seek employment that fits my values of helping others.
Thirdly, about you. Woah, woah, woah. Why on earth would you go Nursing if you already have a Bachelors? That is basically throwing your Bachelors away and along with it about 30k of future potential income. It also puts you into a hospital culture that is difficult without the tools to rise above it.
If you really want to do the healthcare field (as opposed to Giordano's advice), go back and take 5 or so science courses such as Biology, Chemistry, (the pre-reqs that you'll have to take anyway to do RN) and then apply to Physician Assistant school. All you need is a generic bachelors and the pre-reqs mentioned (Again, that you HAVE to take anyway for RN, so it's not like RN lets you get around it).
It's usually a 24 month program, but it will A. put you in a much better position to deal with the social and political down-side of the healthcare system (which can be harsh) and B. make at least 50% more a year. Plus, a PA is REALLY what we grew up thinking a doctor was. A hands on fixer of people's bodies.
I personally explored both paths. Tons of my co-workers in the Fire Dept. are flocking to the RN field. But they don't have a bachelors. However I find myself weary of the healthcare system so I've elected to pursue something else as my next big change.