Prerequisites:


Get the source code, etc:

 

Alternative approach for the Github setup when using Windows:

 

Get the project up and running:

 

I also suggest you use some kind of "Git client" to see which files are changed/staged and to compare files.
Here are some tool suggestions:

There is also a Git plugin for Eclipse called EGit, but I prefer using Git on the command line and GitX or something similar outside of Eclipse.

If you would really like to get into development, take a look at how to use branches for feature development.