Before you start editing, make sure you're on the main branch and that you're on the latest version! Run git pull to pull all changes before making new ones!
If you're making changes to this repo, copy/paste the following commands when you're making your first commit:
git checkout -b "your-name/feature"
git add .
git commit -m "New Feature"
git push --set-upstream origin "your-name/feature"
git checkout main
REPLACE your-name/feature with your name and the feature you're adding! If it's not your first commit, use git push rather than git push --set-upstream origin your-name/feature
Then head over to the GitHub repo online and create a pull request from the branch you just created.
After the first commit, you don't need to copy/paste the above again, you can make commits as usual.