Hi,
I am no LINUX specialist, but have you checked with something like ‘lsusb’ if the device is visible when connected ?
Also check if https://www.nitrokey.com/documentation/frequently-asked-questions-faq#latest-device-driver-missing-on-older-linux-distribution your libccid is new enough - maybe MINT has an old one and you need to add the Vendor and ProductID’s
For the Read-Only Trouble was another thread here on the forum.
Nitrokey Stuck in read-only only in Linux