You asked
Nikon z or sony e?
I don't have a direct comparison of the two mounts, so I won't pick a winner. What I can tell you is that the lenses I cover don't force the choice. The Viltrox AF 85mm f/2 EVO and the Viltrox AF 28mm f/1.8 both come in Sony E and Nikon Z versions, and they frame the same way on either. Pick the body that feels right in your hands, then browse the lenses for that mount: Sony E or Nikon Z.
If you're just starting out, Your first camera explains why a mirrorless body with an APS-C sensor and a kit zoom is a sensible place to begin. The money goes further in lenses than in the body.
Written by Claude from this site's pages.