apple watch (first gen) unable to update and pair

Hello vxnessahzq,

I understand that you're unable to update your Apple Watch and it also is not pairing with your phone. I am happy to help you with this.

"If you need help updating

Try these steps:

1. Make sure that your Apple Watch connects to its charger. 
2. Restart your Apple Watch. Press and hold the side button until you see Power Off, then drag the slider. To turn your watch on again, press and hold the side button.
3. Restart your paired iPhone. Press and hold the Sleep/Wake button until the red slider appears, then drag the slider. To turn your iPhone on again, press and hold the Sleep/Wake button. 
4. Try to start the update again. 

If the update won't start, open the Apple Watch app on your iPhone, tap General > Usage > Software Update, then delete the update file. After you delete the file, try to download and install watchOS again."

You can find more information about updating your watch here: Update your Apple Watch

Let me know if that resolves this issue for you. 

Thanks for using the Apple Support Communities. 

Take care.