Here in Germany we can buy prepaid credit cards in gas stations and put money on them.
I wanted to ask if anyone has any experience regarding if I could book a Wizzair flight using one of these prepaid credit cards?
Depends on the type of prepaid credit card you have. Wizzair accepts these cards:
Credit and debit cards (Visa, Visa Electron, MasterCard, Maestro and UATP)
I don't have experience with this but if your card is one of those types I don't see why it can't be accepted. For more certainty you can contact Wizzair.
Don't see why not. As long as Prepaid card is Visa or MasterCard there will be no issues. I used my prepaid Revolut card on multiple occasions for flight, bus or hotel bookings.