For the convenience of use, we still use debit cards, which cost as much as possible, unlike credit cards, which can be overdrawn, and credit cards must always remember the repayment time, otherwise they will be punished.
But your purpose is to withdraw cash, and you have to pay a handling fee for withdrawing cash in different places.
When you arrive in the United States, you can open a bank account. It is not easy for domestic relatives to transfer money to your account, and the cost should be less.