Hi Dheeraj
Why do you want to upgrade your drivetrain?
The Ninety One Defeatr Pro 29 is an entry level cycle for beginners. Changing the groupset will not change the character of the bike. You will needlessly spend money with not much to gain.
A better alternative is to enjoy this bike as is and when you are ready upgrade to a better bike. Maybe 6-12 months down the line.
Hope this helps!