1: Fork the Repo.
2: Clone the forked copy of the repo.
3: Confirm you are on develop branch.
4: Create a feature branch off develop e.g "git checkout -b home-page".
5: Confirm you are on your new created feature branch.
6: Create a new html file.
7: Copy and paste the contents of template.html into the html file you created in step 6.
8: Proceed with making all your changes.
9: When you are done working on the feature branch you can now do the normal workflow and send a PR.
for more information on git workflow kindly look here