This is my assumption, quebec wants more nurses, however, the preference will be for people who have french knowledge, as the profession demands a good knowledge of french, assuming there are few thousand applications from nurses and the limit for Nurse profession is around 1000, they will take in people with French over people with lesser or no knowledge of the language. I would suggest you to continue with your french and that can definitely add value if you are able to achieve some level, say a2, b1 etc( This will show that you are interested in french) and anyway you do not depend on french points, hence my suggestion.