About creating a shared storage in Proxmox

[lumox]

I have a little Proxmox host machine to which I added a new HDD.

I'd like this new HDD to be a shared storage for my LAN which only I can access to. I still don't know if I should format it with ext4 or zfs. For the record, on my Proxmox host there is already a zfs mirror pool made of two disks in which just a couple of VMs and containers run on it.

Now, I don't know if I'd better set a new container up in Proxmox as a lite weight NAS server as shown here in this video:

Lite Weight NAS File Server in a Proxmox LXC

then passing the entire HDD to it, install samba in the new LXD and sharing the new resourse finally

or

I can reach the same goal by just installing the samba tool on Proxmox directly, then sharing the resourse.
The entire HHD should be encrypted possibly, meaning that nobody can see but me what is inside it even if they move and mount the HDD on another machine.
Could ZFS native encryption of the entire disk be suitable for my purpose?

Could you please help me figure it out and come up with the best solution?

Thanks

ps: No truenas. My little server wouldn't be able to manage it properly.