How do I install UpFront without a starter theme?

How do I install UpFront by itself to create my own theme? I go to your themes & plugins directory and search for UpFront with no results. I prefer to work from a blank template that gives me the options of full-width or boxed site layout with option to adjust the width of boxed sites. Nav placement options would be nice as well, but other than that, I would like to do everything on my own with NO demo or suggested starting points, eg Spirit, Fixer, etc ... simply BLANK.

Can this be done? Am I overlooking or overthinking something here? My goal is to create some ecommerce / bp friendly themes that I can share back to the WPMU community.

Thank you!