It depends what you want to do with your career. All of the DNP programs have their course catalogues online- take a look at the classes.
But first you really need to pass your boards and work as a nurse- in an actual healthcare setting, with actual patients, rather than spinning around thinking about “what comes next”. Don’t get ahead of yourself. Or start to spend the money you haven’t earned yet on the next set of courses! You are on track for nursing-- start there!