192.168.1.* is a local IP address. You need to subscribe to a dynamic dns service to find your external ip address
This allows you to ping something like
kumar.dyndns.com and have it return your router's external address.
You need to configure your router settings to forward activity on the ssh port to your computer within your home network. This is called port forwarding.
Notably this exposes you to some risk. Consider using a non-default SSH port and using private-key-only authentication (rather than a password). If you do use a password you should look into the various packages that defend against bruteforce attacks