this guide will explain to you how to pair an apple watch at the first time with your Iphone and voice over.
first, go to your Apple watch app in your Iphone, which called Watch.
double tapp on it then, swipe until you hear "start pearing " button and double tapp on it.
if you're blind, i suggest you not to use the camera option to pair the apple Watch.
in the next screen, find the button "pair Apple watch manually.
when your watch is powerd on, press triple tapp on the crown button to turn on voice over.
now, swipe to find the code you have to enter on the watch app on your iphone and enter it.
if you have Apple watch with celular data, it will be connected to your phone automatically, if your celular company supports it.
press on continue, and wait to the activation process to complete.
you are done, your watch is ready to use.