Coinmama is the simple exchange that is eligible to use in most of the U.S. states. It has a very newbie friendly interface and allows you to buy and sell different coins. Moreover, it is one of the trusted crypto exchanges. However, the number of this coins is not so significant. You can buy and sell only Bitcoin, Ethereum, Ripple, Litecoin, BCash, Cardano, Qtum and Ethereum Classic. You can also trade bitcoin for USD using this platform.
The commission for filling in the account using credit or debit card is about 5.5%. Actually, this is one of the best places to buy Bitcoin with your credit card.