I mean you've got a debit card, so you're pretty much set to buy btc with coinbase. You'll find people selling gold cheaper via crypto too so it's a win/win
They're multipe ways you can go about it, i'd recommend buying bitcoins from coinbase, or if you're a pleb just pay though paypal f&f but you may be asked for a picture of your ID if you go the paypal route.
stocks.exchange aka sexechange is the sketchiest fucking exchange you could possibly use, so many people have lost their ETH last month.
would NOT recommended anyone this exchange or this shitcoin.