Command Line - psu-libraries/library_data_services GitHub Wiki
I much prefer the command line. It will vary a lot however if you are on a Mac, PC or Linux. If you are on a Mac or PC you are golden. A PC will take more work.
On a PC got to https://git-scm.com/downloads and download the correct software. Then you will want to open the GitBash program to operate on the command line.
If you are on a Mac or Linux it should already be installed. Just open up a terminal.
To get started, I recommend using this tutorial. https://guides.github.com/activities/hello-world/