Start new branch:

git checkout develop
git pull
git checkout -b feature.mynewfeature

Do some work and commit as you go. Don't forget to update corresponding docs. Push to github.

Create pull request on Github.

Run integrationtest.sh , upload codecoverage report (should get attached to existing PR).

Ask for code review.

Branching strategy

More detailed explanation of git branching strategy:

https://nvie.com/posts/a-successful-git-branching-model/