If your talking about American Express premium credit cards vs there lending cards I wouldn't recommend them to you since you mentioned that you don't have good credit.
I would recommend the bank called Orchard
, this is a card for people starting out like you.
If this doesn't work you should try your local bank and I don't mean Chase, Citibank, Capitol1, or Bank of America. What I mean is a bank like Provident, Hudson Valley Savings, KeyBank, or whatever your local branch is.
If these options don't work ask your Dad to go to a bank that you like and ask him to talk to your branch mgr, see if he can then cosign you for a credit card that's appropriate for you.
After a while of using this card, later on you can then think about which card from American Express you want - a lending credit card or a premium charge card.