Please read the post about this on the International Forum. It is in a sticky at the top of the page.
The H-1B visas are not available to nurse in the US any longer, they have not been for over two years. And if anyone telly you otherwise, then they do not know of the expedited process for the green card.
The green card, or permanent residency, is the only visa that is available to an RN for working in the US.
If you are already in the US, and get an AOS filed on your behalf, that process is still towards the green card, and the EAD that gives you permission to work is not a visa.
I have been getting too many pms where nurses tell me that they are going to get an H-1 visa, they do not exist.