Basic steps should be included to guide first-time contributors and Needs to update existing content of this file.

This is not an issue, just a suggestion you can think about.
Instead of naming files as Set1.txt .... Set3.txt......
You can have them named like Set1.md .... Set3.md ......
In this way the content will be more readable and appealing to the viewers when they open that file on github.
For example -

1. Current format -
   paradigm (Main:a standard, perspective or set of ideas ; A way of looking at something ;
   a template; example serving as model or pattern)
   Object oriented paradigm is a new and different way of thinking about programming problems.

2. Suggested format -

paradigm

(Main:a standard, perspective or set of ideas ; A way of looking at something ;
a template; example serving as model or pattern)
Object oriented paradigm is a new and different way of thinking about programming problems.

and one can modify the existing files a little and they'll look great.