Single LVM to LVM-thin configuration

[Al3c5]

I just receive a dedicated server ( with pve-manager/6.4-13/9f411e79 (running kernel: 5.4.128-1-pve)

It has a single 1TB NVMe disk





I'd like to use LVM-thin storage, like the following.




Can I resize my system_root with no risk to corrupt the OS?
(I'm not sure to understand where Debian/proxmox OS is installed, I guess on the system_root LV)

How should I proceed to get the above config?
(No existing CT/VM yet, I just want to avoid losing control of my server)

 

[Al3c5]

I'm not sure I can get this allocation...

At least, I'd like to reduce system_root and add an LVM-thin LV.

Is it safe to execute lvresize on this LV? (the one containing proxmox install I guess)