Tutorial: create an run a Jupyter notebook to do linear regression. Is this page helpful?
Set the permission level.
When privacy is more of an issue then there are alternatives but it's certainly more complex, there's no built in way to do this in Jupyter alone but a couple of options are: Host your own nbviewer. ipynb files into static HTML, this tool is nbviewer.
Choose the location where you want to save the notebook.
First, though: what is a notebook ? A notebook integrates code and its output into a single document that combines visualizations, narrative text, mathematical equations, and other rich media. Best of all, as part of the open source Project Jupyter, they are completely free. The Jupyter project is the successor to the earlier IPython Notebook, which was first published as a prototype in 2010.
Learn more about public notebooks here.