American trying for anything

Hi MKMac,
Your first step would be to have a look at udi.no/en
That's the immigration website for Norway and I'm sure a lot if not all your questions will be answered just by perusing the website.

Hi MKMac,

you don't need to be married to apply for a visa. There is the fiancee visa you could try. Just check with udi.no. I  also recommend to contact the Norwegian embassy in the States. They should be able to help and answer your questions.

On the professional side :
NOKUT (nokut.no) is the website for information on recognition of foreign education / certificates.  Try these links:
nokut.no/en/foreign-education/other-recognition-systems/authorisation/list-of-regulated-professions/
and sak.no.
You need to prove Norwegian language skills, if you want to work in the health profession (and many other professions). So I recommend to start learning Norwegian.  It is difficult (but not impossible) to get a job in Norway without speaking the language.