So basically:
1.reconsider watching Fate/Stay Night 2006 (I hope battle scenes are good)
2. watch Fate/Stay Night Unlimited Blade Works again (because I want to)
3. watch the Fate Stay Night Heaven Feel movie series
4. then I can watch Fate Zero
5. after that, I'll watch Fate Apocrypha, Fate Grand Order, Fate Extra is the order I want
6. after that, watch the OVA Fate Prototype
there is also mention of a few others that I'll find and watch in correct order (if necessary)