The master key should only have the Certify capability, which we will use for creating subkeys.
Run the gpg --full-generate-key --expert command to start key generation. Select the ECC (set your own capabilities) key type, which currently is option nr 11.
> gpg --full-generate-key --expert
gpg (GnuPG) 2.4.9; Copyright (C) 2025 g10 Code GmbH