What you are describing sounds like an outreach coordinator kind of position. There is no actual hands-on nursing involved. It involves a lot of setting up tables at health fairs, some public speaking at community gatherings, staff inservices, putting some miles on your shoes dropping off pamphlets at barber shops, public libraries, etc. Yes, there are such positions.
A lot of public health nursing isn't what you know, it's who you know and getting them to know you. You will want to be invited to gatherings and you will need to get your name out there. That only comes with experience within the department and getting your own identity established doing the more 1:1 stuff.
Not sure if this is what you are looking for.