Order of fate series?

As
2

There are now the complete fate parts on Netflix and I wanted to check them out but have no idea which one to start with.

Ji

Doesn't matter relatively. But here you have the relations.

https://www.anisearch.de/.../relations

gr

Fate / stay night: UBW (2014)
Fate / stay night: Heaven's Feel I.
Fate / stay night: Heaven's Feel II.
Fate / stay night: Heaven's Feel III.
Fate / Zero