Create a account on github
Join AUV-IITK on github
Apply for student developer pack
Fork this repo https://github.com/AUV-IITK/learning_git to your account.
Clone the repo to your machine
Make a new branch called "add/your-name"
Make a new file named "your-name"
Commit it.
Make a new directory with "your-name" and some random files in it.
Commit it.
At this point you must have added a new branch and made 2 commits in it.
Now push this branch to your fork on your github account.
Create a new a pull request to the main repository.