Whenever you add a new contest, make a new folder for that and add Readme.md file for link to the contest if it doesn't exist already. You can upload solutions in R or Python Language. It would be wonderful if you add Jupyter notebooks for exploratory data analysis.
git clone https://github.com/vermashresth/Kaggle-Contests.git
git checkout -b "Branch-Name"
Give your code a meaningful name based on methods used.
Add all of your files using-> git add
Commit your file changes using -> git commit -m "Whatever you did"
push your changes -> git push origin "Branch-Name"
Create a Pull Request to master
Fork Repo on Web Page
Clone the forked Repo
Make your changes on your forked repo
Make a Pull Request to master