With the psychiatric nurse training, and only that, you will be unable to sit for US Boards, whether NCLEX-RN or NCLEX-PN.
Even if you qualified to sit for th LPN boards, it would do you no good at all.
You would be unable to get a green card under those conditions, you would not be fast-tracked, and it would be almost impossible for you to find a sponsor since your application for visa would be with all of the others.........and take at least three to four years or so............
Best bet is to submit your documents to CGFNS for evaluation and see what they will give you credit for and what you need to make up...........no matter which way you choose, you will still need a Visa Screen Certificate, and this is done thru CGFNS........so I would start with them...........
The applicaitons for them are at:
www.cgfns.org.
Good luck..............
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