How can I get a insurance on my iPhone

You would have to find an insurance company, and one that would allow a policy for a device already broken (which is extremely unlikely). Apple is not an insurance company and does not sell insurance.

So at this point, all you realistically can do is pay for repairs or replacement of your device.

Carriers offer it as long as the phone is less than a month old. Apple should also offer coverage for accidental damage within 60 days of purchase. If you have not done this, you have to pay out of pocket.