updated the pre-requisite para for more clarity

Added the part of picking one of the courses below before all the courses are listed on line ossu#400. Removed the "PS" part below line ossu#407

Author: wuodland

README.md

@@ -397,14 +397,16 @@ You must share **only** files that you are **allowed** to! **Do NOT disrespect t
 
 The **only things** that you need to know are how to use **Git** and **GitHub**. Here are some resources to learn about them:
 
+**Note**: Just pick one of the courses below to learn the basics. You will learn a lot more once you get started! 
+
 - [Try Git](https://try.github.io/levels/1/challenges/1)
 - [Git - the simple guide] (http://rogerdudler.github.io/git-guide/)
 - [GitHub Training & Guides](https://www.youtube.com/playlist?list=PLg7s6cbtAD15G8lNyoaYDuKZSKyJrgwB-)
 - [GitHub Hello World](https://guides.github.com/activities/hello-world/)
 - [Git Immersion](http://gitimmersion.com/index.html)
 - [How to Use Git and GitHub](https://www.udacity.com/course/how-to-use-git-and-github--ud775)
 
-**ps**: You don't need to do all of the courses. Just pick one and learn the basics because you will learn more on the go!
+
 
 ## Change Log