I can't help with the non-traditional part of the install (PC being traditional)
Preferences: Sharing over the Net: is where you configure sharing stuff
Main: sets the port to listen on (you will need to port forward on your router for WANside access)
User accounts: is what you want. This allows (passworded) access to specific libraries, allows changes
Calibre companion (Android ans IOS), can connect to your IP

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Any browser (Win,Mac,Linux) can connect to your IP

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