You can get a prepaid credit card almost anywhere from your bank to Walmart to the corner convenience store or gas station. You give them money which is loaded onto the card. You can then use the card like a credit card until all the funds are used up. Then you have to load more money onto the card.
Be aware that you will be charged fees. Sometimes there are charges to put money onto the card, some may charge a monthly fee, and others may charge each time you use it. Some may charge all these fees. It is a good alternative for those unable to get a regular credit card. Because it is prepaid, they are readily available to almost anyone.