Can't set up my cellular connectivity on apple watch. I need help

Hello everyone,
do anyone know how do can I set up cellular connectivity on my new Apple Watch?

Hello, haw are you ? I recently bought an Apple Watch and here are the steps I followed to set up the cellular connectivity on it. First open the Watch application on your iPhone. Then you have to go to the My Watch tab and press Cellular. If this is your first time setting up select “Configure Cellular Service”. Follow the instructions to pair your Apple Watch with your cellular plan. Once set up, your Apple Watch will use cellular connectivity when your iPhone is out of range. Don’t forget to make sure you have a cellular plan compatible with the Apple Watch and that your carrier supports this feature.