This tutorial will help you to learn all about NDVI. In first part you will get the basic of NDVI and the Bands importance for NDVI. Than you will learn how to extract NDVI from Landsat8 satellite Image. Finally you will able to create a beatiful NDVI map layout with the proper ranges. Which will help you to use in your scientific study.
If you have any question, don't hesitate to ask. Happy learning.

This paper followed to range the NDVI value:
https://www.mdpi.com/20724292/11/2/105

How to Download Landsat Satellite Data from USGS I Satellite Images Download from Earth Explorer:
   • How to Download Landsat Satellite Dat...  


01: 00 Basic knowledge about NDVI
01: 20 Calculate NDVI from Landsat 8
04: 45 Masked the Study area
06: 37 Classify the NDVI with value
11: 05 Create Map Layout and Export the Map