Accredited or not Accredited? That is my questions!

I am an ADN RN looking for a good NP course. Ultimately I would like to do psychNP, and if possible do the course online because I live in a rural area where I take care of my parents. However, the issue is finding out if the school is accredited. Keep in mind, I would like to work for the VA and according to their requirements, all NP’s must have graduated from a school which is accredited by the NLN. Then I started wondering, how many other facilities and hiring agency have stipulations such as this? What is the golden standard for accreditation? What about the minimum standard? If you can help please reply…thanks in advance! I am a Texas resident (about 60 mins north of houston)