Apple Watch cellular version as standalone device for my grandma for location, fall detection and tracking health vitals

I got an idea to use Apple Watch like that for grandma and give it her for Christmas. Will it work like that if I pair it with my Apple ID and use a new SIM card. I want it for her on a daily basis use just like a watch AOD. But just in case use fall detection and learn her how to use ECG and other health tracking things.