Can i send messages and phone people without my iphone or WI-FI being nerby on an apple watch series 2

This describes what you can do with the Apple Watch while not having your paired iPhone nearby, How to use your Apple Watch without your iPhone nearby - Apple Support

The Series 2 does not have cellular capability, so unless you have wi-fi calling and are connected to a known wi-fi network, you will not be able to make a call from the Watch without the phone nearby.

You could not send an SMS, and you could only send an iMessage if connected to wi-fi. The information is in the document that I sent.