Work as a BSN RN

Are you in nursing school right now? In my state, RNs do not ride in ambulances unless they also have an EMT certification or something similar, and I'm sure this is true for most states.

Are you asking what kind of work you can do while still a BSN student, or after you become an RN? Unless you are a CNA, then there's nothing you can really do in the acute care setting while a nursing student, unless there's a student nurse externship program in your area. The only externship program available in my area was in NICU. If you're asking what kind of jobs you can do after you graduate, then just google RN specialties and you will find a huge list of options.

Well...

In most states you cannot work on the ambulance unless you are an EMS provider meaning you would need at least an EMT certificate. It takes like 4-16 weeks to get depending on the facility to get an EMT certificate/license (depends on state). Even then, you are not guaranteed a spot on a truck and if you work with a paramedic, the paramedic would have to take the call if it is a serious incident leaving you to drive. If you are a BLS truck in a private ambulance service, 85% of your calls will be routine transports. Even as a paramedic in a private setting, 50% of the calls are routine or it'll seem routine.

Research your area and see what the requirements are for working in the hospital. My area requires people to be a CNA or having completed their first semester of clinicals to be a nurse tech, patient care tech, or nursing assistant. To be a "nurse extern" or a "advance nursing assistant" (only one system uses those titles), you have to have two semesters or be a LPN. For the ER, they will take EMTs usually in place of the CNA except for the hospital I am currently in.

You could work in patient transport usually which is transporting non-critical patients around the hospital or transporting a critical patient with a nurse. It's not transporting outside of the hospital.