I hope it goes well, too. Sorry about your job search
troubles. I have actually considered doing mental health and going on for a substance abuse counselor certification and then, eventually, once I am established in my career, going on for my MPH.
Nursing field wise, I am thinking public health, mental health, and detox clinics. I may be a new grad but I have a ton of personal experience in this realm. I think personal experience can set a person apart. Anyone can get the education and hopefully, work experience, but not too many people can say they have walked in our shoes. That is important when dealing with people with addiction, dependence, and mental illness. It's important to me anyway.