My server first ran freenas, but after seeing a lot of video's about unraid, i decided it was worth it simply for the array parity and expandability options further down the line. Since then my server has more than tripled in storage size haha. I just keep finding new things to do with my server and keep expanding it.
I knew nothing about servers when I first started, and I still don't know much really, but thanks to the community and the usability of the OS, it's all very simple and approachable.
Keep doing what you're doing!