You either need an iPhone, ...
...Or you must be treated like a depended child, and use the Apple Watch Family Plan where a parent's iPhone controls your Apple Watch.
Set up Apple Watch for a family member - Apple Support
You can do things like:
- Raise your Apple Watch arm
- Then say: "Hey Siri, message Mom"
- Siri will ask what you want to say.
- You respond with your brief message, with no pauses, else Siri will think you are done.
Assumes "Mom" is listed in your contacts
NOTE: If you are using the Apple Watch Family Plan, this is Apple's iMessage, not traditional TEXT/MMS. So the other person needs to have an iPhone. If you have your iPhone, then the Apple Watch will relay TEXT/MMS messages via your iPhone, as long as your iPhone is accessible via Bluetooth, WiFi, or the Internet.
As for phone calls, you can just hold your Apple Watch around mid-chest level and basically use it as a speaker phone.
It would be best if you can go to an Apple Store and get a demo of the things you need the Apple Watch to do, so you know if it is worth it for you. Or if you have a friend/family member that already has an Apple Watch, work with them to make sure you can do what you need before buying.
