I am a German nurse.
Try to get a job on base as nurse, bc the work condition and payment is much better than in our local hospitals.
However if you want to work in a German hospital, it is a good time right now( nursing shortage) but be prepared, that the salary is low and the work density is much higher than in the US. Also most employees are expect that you work overtime of course unpaid, bc you do it for the patients.
You need to speak German fluently to work at a German hospital and you need to take a test for it.
If you have a BSN it is pretty easy to get your German license. ADN and Diploma can be a little bit tough, but I think you still will get it.
For Rheinland-Pfalz you get your information here Aufsichts- und Dienstleistungsdirektion Rheinland-Pfalz | Anerkennung ausländischer Zeugnisse | Willkommen in Rheinland-Pfalz
Be prepared that the system is different, most hospitals don't works with aides and on floors you mostly with two or three nurses for 20-30 patients. On ICU, you mostly have 2-5 patients.
If you have any question, I am glad you help you.