An extremely handwavy crush course on Github
What is provided here is only a tiny fraction of the tip of an iceberg that is the set of all the functionalities provided by the glorious Github.
Note
Make sure that you already have a github account registered.
If you have not already done so, you can try using SSH keys for your account so that you do not need to type in your username and password everytime you visit.
I also wrote a relatively detailed explanation on how SSH works. Check out