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What distro are you using? JF recommends Ubuntu.
FWIW, I found TechHut’s Jellyfin YouTube tutorials super easy to follow when I was just starting out. He also has a video on FStab which you might eventually find handy. I haven’t watched this stuff in long time though so it might be outdated. https://www.youtube.com/c/TechHutHD
I’d start with proxmox.