Sorry, but the US does not subsidize education in the way that other countries do - even for "essential" careers. If you are looking for financial assistance, it would be more likely to occur through private foundations rather than governmental entities.
I encourage you to contact nursing schools and speak with them directly to analyze your own situation. Even though there are some mandated standards for all nursing programs
, there is a great deal of variation in how those standards are operationalized. The end result is - each program has it's own unique admission and curriculum requirements.
Just a bit of background that may assist you in your conversations ..... In the US, physicians are the only profession authorized to practice "medicine" - this scope of practice includes areas that are reserved for physicians only. Nurses are authorized to practice "nursing" - this is a different scope of practice, but does include some activities that are delegated by physicians. Our industry is referred to as "Health Care", not "Medicine", because it also includes many other "Allied Health" professions as well. As if that was not complicated enough, the actual practice of medicine, nursing and all other health care professions is controlled at the state level. States reserve the right to control the professions via formal "Practice Acts" (e.g., Nurse Practice Act) and they alone can issue professional licenses - there is no nationwide license for any profession in the US.