How to fix Vivo U10 display at home..?

The screen on your phone is pretty standard in how it comes off. There don't seem to be any step by step iFixit-style guides out there, but I did run across a decent YouTube video that should get you through the process.

Vivo U10 Crack damage BrokenTouch+Screen Combo folder change replacement/How to open Vivo 1916 - YouTube

The screen itself seems to be readily available; I usually start with Amazon, eBay and AliExpress. From my cursory search this is one of the first ones that came up.

Tested Well 6.35" For Vivo U10 Lcd Display With Touch Screen Digitizer Assembly Replacement U10 1916 V1928a Display Screen - Mobile Phone Lcd Screens - AliExpress

That should get you going; that particular one even comes with tools, so all in all you should be able to fix your phone for under $15 - $20 USD. Good luck; let us know how it goes!