EDIT: Solution in next post (this started as a question; yeah maybe I should have split it, but whatever).
Apologies if this is dumb question. I finally got my hands on some appropriate (64-bit) hardware, and ready to install software now.
I have read so many threads (in Kobol Club and elsewhere), Issues (at GitHub as well as Atlassian) and I think this is solved by now (on Armbian) but cannot confirm?
Official install instructions (on OpenZFS website) don't really seem applicable to Armbian (kernel headers will be different, etc.).
I guess what I am asking is, do I just do something like the following:
$ sudo apt install zfs-dkms zfsutils-linux
And it should "just work"? Or is there more to it than that?
Looks like I should make sure backports are set up beforehand, as ZFS version is significantly newer there (2.0.3 vs 0.7.12).
Target device is ROCKPro64, on latest Armbian 21.02.3 Buster Current, which is kernel 5.10.21.