How to change display glass

@srinivasan83322 the glass is part of the display assembly. Those Are "glued" together. Unless you have the machinery, tools and skills, doing a glass only repair is pretty daunting. In your case I suggest that you replace the complete display assembly. Use something like this guide to work on your phone. It is in French but browsers like Chrome etc. translate it reasonably well.

iFixit does not yet have a guide for this model. You can be the pathfinder for that. While you work on your phone, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has the same problem as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.

Repair is War on Entropy!