Buy Minecraft despite Family Link?

Hi, I have the following problem. I have the Family Link app on my phone. I wanted to buy Minecraft, which costs money and maybe I wanted to buy a Google Play Store voucher. My question is now. I've already tried it without a voucher, this didn't work because there was something with a family payment method. Do I still have to set it up when I redeem a voucher or do I still have to set it up? I also wanted to ask if it is even possible to redeem a voucher without a family payment method, because if not then I bought the voucher for free.

This family link. This only creates problems. Such nonsense. Always try to talk people out of it…

But no, I don't know. Helps only get rid of the app and create a new account, which would be advisable in many ways.

I tried to create a new account, but it doesn't work.

You have to choose a payment method each time

Can I then use the voucher?

You can use your credit on Playstore