Things are easy or free. Rarely both. :) it’s well worth learning OMV. If you have any questions I’ll try to help!

I run OMV baremetal for last few years. I really like it. I did try TrueNAS and found it too convoluted.

Nextcloud is a totally different beast that would run on top of either.

OMV allows you to use ZFS as well if you want (I do) but also the flexibility to use other raid systems.

I just wish they’d left in portainer as default. No point reinventing the docker wheel…