Payment issue (France)

Hello !

Sorry to bother but I can’t buy anything from the marketplace.
I’m from France, and I can’t choose my country in the credit card section.
I tried to pay via Paypal but it gives me an error :

‘Sorry, we can’t complete your purchase at this time’

What should I do ? I looked into Paypal settings but I found nothing useful.
I don’t really know how international payments work so I’m really stuck on this.