I have been having a similar debate. From what I have gathered, it really depends on what you want your role to be and what kind of organization you want to work for. For MSF and other emergency medical aid organizations, your degree in nursing will be great (need those mandatory 2 years acute care experience though to apply). An NP title will vary with respect to your role in the organization, but you will have that mighty ability to prescribe and diagnose, if you think that is something you'd prefer.
Because you mentioned community health, a BSN will get that for you (most programs include a public health certificate which enables you to work in public health-doy
). My goal is to work abroad in a developmental aid sort of role. I want to work with the populations long term to improve things and thus am seeking a public health position now (just out of school) before I venture out and about.
Anywho. Keep researching and keep going back to the root of what you want your work to be like. You'll get there