You asked
Can I adapt old lenses to nikon z?
Yes, you can. Old lenses are one of the cheapest ways to try something different on a Nikon Z body. If you have lenses from Nikon DSLRs, the Nikon D7500 page notes that they adapt to Nikon Z with the FTZ adapter. The Nikon D5600 and Nikon D3500 pages say the same.
Older manual-focus lenses from film cameras are a fun option too. Mirrorless mounts are shallow, so they adapt easily and cheaply, but you'll be focusing by hand. Read more on the Lenses page.
Written by Claude from this site's pages.