Should I buy American insurance after immigrating to America?

You definitely need to buy insurance. They usually buy commercial insurance.

Regarding medical insurance, according to American law, there is no working experience in the United States or the condition of not paying medical insurance tax for more than ten years. Australian and Shenzhen immigrants reminded that new immigrants who come to the United States cannot automatically qualify for Medicare medical insurance.

New immigrants must hold a green card for more than five years and be over 65 years old before they can pay insurance premiums to the government's medical insurance plan and buy medical insurance plan A, that is, hospitalization insurance.