I guess I'm just confused on how I want to get there.
At this point, why not try to contact some nurses who have their
DNP and are working in Public Health. You can contact schools of nursing
to see if their Alumni office can suggest some individuals that you can
talk with who have finished the DNP and are out working.
You can then discuss your plans and concerns with someone currently working in the field..
As for the MD program, consider contacting schools of Public Health.
Many of the instructors are MDs and many are involved in community
outreach and issues of emergency/disaster planning and epidemiology.
They may have some suggestions from their point of view on
how to reach your goals.
Whatever avenue you take, best wishes on all your goals!