Do Check out Contributing.md
If you are very new to Open Source and Don't Know about Git and Github you should learn them. Learn Git and Github
git clone https://github.com/yash-gulatii/Hacktoberfest-2023.git
Add your Code in the Directory for Your Programming Language (Create a Directory if it doesn't exists)
cd Directory_Name
cd ..
git add -A
git commit -m "Your Message"
git checkout -b <branch-name>
git push -u origin <branch-name>