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On credit cards, the most important protection is the ability to charge back fraudulent purchases. You just call your bank, tell them which purchase is fraudulent and you'd like charged back for which reason, they then contact the seller to determine what happened, and if they either don't play ball or don't answer, they charge back and rip the money out of the recipient's accounts.

Real credit cards also have other protections, such as mobile device protection, travel insurance (cancellation, sickness, etc.), cash back (paid for by merchant with credit card fees), whatnot.

As for where to get prepaid cards, it depends on where you are, but in Canada, lots of banks offer pre-paid Visa cards, especially useful for teenagers so they can make online purchases without the responsibility of a credit card.

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I just looked it up, it was actually pretty hard to find. Desjardins and Scotia both discontinued their prepaid cards, but here's an example of one from CIBC: https://www.cibc.com/en/personal-banking/prepaid/ac-conversion-card.html