iMessage not working on Mac at all

​The following archinet forum is explanatory and commendable.I want to include that I am unable to reset blue tooth in my macbook Air.I have tried out the following configurations as guided by the https://applemacsupportnumbers.com/blog/imessage-not-working-on-mac/​​ .I have tried out following this
After Holding and pressing the Shiftkey + Option (Alt) keys on your Mac's keyboard, click the Bluetooth symbol in the top-right corner of the macOS menu bar. ...
Located the revealed Debug submenu and hover your mouse cursor over it.
Then Clicked Reset the Bluetooth module.
After that restarted the mac.
Suggest us if we have to include anything.