Change Xbox balance gamertag?

I have a question: For example, if I If I buy a 10 euro Xbox credit card, can I change my gamertag with it, for which I would actually have to pay 10 euro? Or are there different ones?

There are no different cards. You have to buy a 10 euro Xbox card. But changing the first time is free

Thank you so much! I've just changed my gamertag before but screwed up something… So just a card like that? https://startselect.com/at-de/xbox-live-guthaben-euro10/23729

Yup

Or simply with a credit card

OK thank you! I want that for Christmas because 10 euro is not a small amount. But thank you very much!