This video will make your work more easier....!!

A good explanation for importing a group of coordinates into Google Earth at the same time.

A easy way to convert UTM coordinates to Decimal degrees, explained in the video.

Explained how to save image from the Google Earth including all the imported coordinates.

Link for the excel file to convert UTM to Decimal Degrees:
https://drive.google.com/file/d/1dnws...

Link to Google earth website to download Google Earth Pro: https://www.google.com/earth/versions/