Thanks.
Its works
But its demo it generly.

If you want to create a demo for 24 months, use it: https://www.odoo.com/trial?edu

Go to Settings --> Activate the developer mode --> Load Demo Data -- (Yes I understand the Risks)

Please Note: Opt for it only if you are using for Demo, and not meddling around with any live database you've already done. Just to be on the safe side, play with demo database with a dedicated demo account signup/ login 

Here's the YT video for quick reference for enabling/ identifying demo database: https://www.youtube.com/watch?v=Y7anVwK3_WY

Best Regards