i think your best bet is to hash out all of the details of your situation with a navigator who can work with you personally to select the best plan for you and your partner. here's where you can look for that personalized help in ny: localhelp. healthcare. gov.
previously i had been insured through my partner's health insurance plan at his place of work as a "domestic partner". are any of the plans on the ny exchange providing "domestic partner" coverage? how would you determine "household income" in that instance?