That's it. Make sure it's from your own fork though.
The workflow is:
Fork my repo on GitHub, then...
git clone <your fork>
git branch meadowphysics-docs
git checkout meadowphysics-docs
Make your changes
git add <changed files> # multiple times if necessary
git commit # warning this will open VIM... :wq
git push -u origin
Go on the GitHub website and open a PR
If you're using the desktop client, hopefully the command line steps should correspond to what you do in the GUI.