Here's how to create your Jabber account :
Download a Jabber client (there are clients available for Windows, Linux, Mac OS, Android, iOS and many others)
Create an account on one server (click here)
Login and add our Jabber address (showing at the right side)
It's also recommended to create an encrypted email here

https://getnewcitizenship.blogspot.com.br/2017/08/heres-how-to-create-your-jabber-account.html