If Debian can't detect your network card, I suggest using Debian DVD iso to install Debian, and then deal with the network card.
You need "debian-10.8.0-amd64-DVD-1.iso". It can be used to install Debian without a network connection.
You do not need to provide a proxy. Just leave this field blank.
After successful installation, check that you can log into your system, and google "<your card name> + Debian" or check this wiki:
You can also write the name of this card to this list: someone may be able to help you.