so how does the fate series work...I watched fate/zero & stay night unlimited blade works but I hear theres other stuff....is it related at all to those? are they any good?
Most of it is just alternate realities. In terms of the main stuff:
1. Fate Zero (prequel story)
2a. Fate Stay Night Unlimited Blade Works TV (Route B of main story)
2b. Fate Stay Night Heaven's Feel movies (Route C of the main story; 1st movie is out, 2nd is in theaters next month in the states, 3rd comes out next year)
Route A (just Fate Stay Night) was adapted like 10 years ago, but it's a shit adaption, so no one talks about it since it's fuses all 3 routes together into a mess.
The 3 different routes feature the same characters, but the focus is on a different heroine each time and diverge greatly from each other.
Any other Fate property you heard of (Apocrypha, Grand Order, Extra Encore) is spin off alternate reality stuff. YMWV with those. Feel free to check them out if you like the main series. Avoid Fate Prisma Illya like the plague though.