>>281124185
While most would suggest reading/watching Zero after Stay Night, it's not too big of an issue if it's your first, barring some spoilers and a few character inconsistencies.
SN, Zero and Hollow Ataraxia make up Fate's "core trilogy".
I suggest you go through FSN in VN form, since it's got great presentation and doesn't suffer from issues like QUALITY, lack of monologues and a truncated story like the adaptations do. The Ultimate Edition(s) Beast's Lair provides for both FSN and FHA are the way to go thanks to their customizability (and the option to view the KINO H-scenes). FSN is 60 hours long (split into 3 routes) while FHA is 50 hours long w/ optional side content like minigames and art galleries. Have fun
