...but we have children who visit...
This will tell you which Nvidia card you have and list which drivers are supported with it - below is the output for my old Dell - and as you can see I have a NVS5200M that the last Nvidia drivers available are the 390 Legacy drivers which are no longer used - So I just use the default Nouveau drivers and all is goodnvidia-detect
user@debian:~$ nvidia-detect
Detected NVIDIA GPUs:
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GF108GLM [NVS 5200M] [10de:0dfc] (rev a1)
Checking card: NVIDIA Corporation GF108GLM [NVS 5200M] (rev a1)
Your card is only supported by the 390 legacy drivers series, which is only available up to bullseye.
From which repos?When I install NVIDIA driver from repos