[throw0101a]

> That's my case, I'm learning before setting up a cheap home lab and a NAS, and I'm wondering if biting into ZFS is just the best option that I have given today's ecosystem.

ZFS is the simplest stack that you can learn IMHO. But if you want to learn all the moving parts of an operating system for (e.g.) professional development, then more complex may be more useful.

If you want to created a mirrored pair of disks in ZFS, you do: sudo zpool create mydata mirror /dev/sda /dev/sdb

In the old school fashion, you first partition with gdisk, then you use mdadm to create the mirroring, then (optionally) LVM to create volume management, then mkfs.