In the US the most popular way to get bitcoin is from a bitcoin exchange called Coinbase (www.coinbase.com). Another popular option is Circle (www.circle.com). There is a site called Local Bitcoins (localbitcoins.com) that enables you to buy bitcoin either online or in person. If you need help buying bitcoin, consider asking the community for help. The people in the Bitcoin Subreddit on reddit always have suggestions to help new people get in to bitcoin. Please always use discretion in all concerns regarding money. If it sounds too good to be true, it probably is.

Generally buying things with bitcoin is similar to using a credit card, but it is definitely not exactly the same. Possibly the easiest way to do it is to use a wallet app on your mobile device. Frequently when prompted to send bitcoin a QR code will be displayed and you can use your mobile device and wallet app to take a picture of the QR code and process the payment. You can also install wallet software that has sending functionality on your computer. There are many types of wallet software so please be sure to review the different types of wallets to determine what fits your needs best. Frequently bitcoin exchanges also have wallet functionality built in to it so you can send directly from the service where you acquired your bitcoin. As with acquiring bitcoin, the bitcoin community can be a great help with these matters some times.