I would like to take a moment to say that I am pleased that I successfully built my own router with OpnSense, got the SFP28 fiber network card working on my server, updated proxmox to the latest version of debian, and successfully fired up one of the old containers already on it.
Took two days to do all that, but things are configured very nicely.
Thank you @sparkler for the proxmox help.
Next week maybe I'll set up matrix or something just as useful.