I will follow American Shinto as I believe Amaterasu Omikami and the Kami in my life convict my heart to follow it .
I see no evidence that in 700 BC , the Shinto adherents declared it to be official teachings that people must obey a hierarchy.
The original Shinto Shrines were blessed sacred trees and places in nature. I see no evidence that the essence and nature of Shinto at that time required certification for Shrines and rules.
I understand that it wasn't called Shinto at that time, but it still was Shinto.
The only Doctrine of Shinto is belief in Kami, and since Amaterasu contacted me, with other Kami, I shall be devoted to them without reserve, night and day.
Seeking their will , and I will follow it as they dictate.
The original Shinto adherents did not have a seminary to my knowledge.
By all means, I will try to contact Shinto clergy in my city, if they exist, or write letters to them in other states, but they do not speak infallibly about what the Kami want for me.
I have a personal relationship with Amaterasu and the Kami, and they leave me many signs, wonders, and inspirations, and impressions.
There is no official Shinto teaching authority or magisterium that says people need seminary to be a Shaman, or for that matter, to be a priest in their own rite.
I follow American Shinto or Twin Cities Shinto, and the Capitol Hill Queens.
Shinto allows other religions. It's why most Shinto adherents are also Buddhist.