First Of All....
You should have git install by now. In addition, you should also install the GUI App (GitHub Desktop). If you've not installed GitHub Desktop, install it now from here.
Now use the Clone or Download button to clone this repository to your computer. Select, Open in Desktop and wait. See how seamlessly it works?
We need to be well coordinated when having many people contributing to the same project files. A lot of workflows have been created to address this issue. I have done some research and put together some guidelines that will help us work together smoothly. Please make sure you study it.
Click on the file CONTRIBUTING.md above to read some important information about how we will be collaborating on this project.