For the requirements you just need your ID, your car, and the minimum wave coverage which is $10000, go to a DMV and you can begin your process. Regarding out of states documents: No. We will NEVER accept out of states insurance documents/coverages
But what can I do with my insurance from another state?
If your coverage time haven't lapse you can still use it there. Whenever you go to a different state, that you have an insurance in, DMV will cover you there. So, if you ever go back to that state your insurance will still work.
If my vehicle is registered here in new york, would that be a problem when I visit another state I have a insurance in?