I think the IX Systems would rather Truenas scale be an enterprise OS, and have short patience for people learning the ropes.
Kubernetes to me is a lot more complicated than Docker, but I'm sure in an enterprise environment where you have many systems to administrate it is superior. Docker would be a better, simpler solution for a person at home with one computer being used for their personal virtualisation.
I think going back in time I would go for Unraid, and use Docker containers.
Apparently it is better documented, more beginner-friendly. It is a one-off payment, but it is reasonably cheap.
Community seems much friendlier too.
Bear in mind I haven't used unraid, so potentially there is a grass is always greener situation going on here.
That said, I have thought about running a VM in TrueNAS so I don't need to muck around with kubernetes and using a discord chat for troubleshooting.