Follow your passion because all roads will lead to there in the end. I would recommend reading up on everything you can find about the occupation. You may find you want to be a travel nurse. There are a lot of options in the nursing industry.
I agree, with a previous comment, the lack of a degree may be hurting your chances. If that is the case, and you do put the time and effort into a BSN then you will be on par with the competitive landscape. You need an edge because lets face it, your age is probably a factor whether they want to admit it or not. If you're going to make the effort to go back to school you may want to consider taking the RN to MSN to get the edge back. It's worth checking out and can be done conveniently online.
Follow your heart, follow your passion, the rest will work itself out. But, do take care of yourself with trying to get adequate sleep and a sleep schedule, eating properly (avoid binge carbs & sweets). Whatever your belief, ask for spiritual guidance and believe.