Inkscape works well for this.

You’d probably be better off picking a normal distro and then running QEMU to run Windows or other VMs. Proxmox is more comparable to VMware ESXi in that it is designed for running server VMs and managed through a web ui.

When you say you want to use proxmox as your daily driver, what sort of things are you wanting to do with it? Are you going to be spending most of your time inside a WM, and want to be able to switch to a different VM? I’m struggling to see your use case.

Yes, Picard should be able to add the tag, flac support is great

Depending on which format your music is in you can store a star rating in the metadata of the file.

This sounds like a job for a raspberry pi 5 with an m.2 hat for storage, software is a less important choice here, so ubuntu’s raspberry pi flavour would be my choice. Just make sure you give it power in a form it likes.

Yes, iirc in Openwrt the default rules allow all traffic between vlans

It’s worth noting that you will have to set up firewall rules on your new router to block internet access to specific vlans. By default your router will probably allow all traffic between all vlans.

If you want to segregate the video doorbell it works the other way around, allow internet access to that vlan and block access to your main vlan.

Jellyfin has ebook support and allows you to download them for offline reading, which I reccommend because the ebook viewer is very basic

Are you able to change the ip address of your current router?