International student insurance help

Hi!
I am an international student and will move to New York in the Fall.
I don't know anything about insurance, but I am required to get one, and I got in contact with ISO.
I have three options: the silver, the gold and the platinum plan.
They all seem great to me, but I really don't know how much medical expenses can be in the US.
I can't afford the platinum, I am conflicted between the gold and the silver.
I have a pre-existing condition, and I have to take pregabalin for it everyday. The only plan that covers preexisting conditions after six months is the silver, so it seems like the best option, but it's also the less covering. I would need to buy medication and get somebody to prescribe it to me, and I was wondering how much that would cost without insurance, to see if I could afford to get the gold plan to be more covered in case of emergency, and buy medication without insurance coverage.
Can you help?
I wrote the general characteristics of the plans below.

Silver:
Cost 31 per month before I turn 25 (January), 54 after that
Annual maximum 400,000
Per injury/sickness max 150,000
Deductible per event student health center 45
Deductible per event elsewhere 100
Copay Emergency room 350
Emergency room 80%
Coinsurance 100% up to daily benefit limits
Pre existing conditions covered after 6 months
Medical evacuation 60,000
Repatriation of remains 50,000
Provider network first health and multiplan

Gold:
Cost 49 per month before I turn 25 (January), 95 after that
Annual maximum unlimited
Per injury/sickness max 300,000
Annual deductible in-network 500
Annual deductible out-of-network 750
Copay student health center 25
Copay primary care physician 40
Copay specialist/urgent care 50
Coinsurance in-network 80%
Medical evacuation 120,000
Repatriation of remains 60,000
Provider network first health and multiplan

Platinum:
Cost 75 per month before I turn 25 (January), 118 after that
Annual maximum unlimited
Per injury/sickness max 500,000
Annual deductible in-network 250
Annual deductible out-of-network 400
Copay student health center 15
Coinsurance in-network 80%
Immunizations and preventive care 200
Medical evacuation unlimited
Repatriation of remains unlimited
Provider network first health and multiplan