Can I use OctoPi locally?
To use it locally you need to be able to view the desktop. 
sudo raspi-config  to pull up the config menu and enable boot to desktop.
If there is no browser installed already you'll need to install one.
sudo apt-get update
sudo apt-get install epiphany-browser

Open the browser and navigate to http://localhost/

I recommend configuring access control when it prompts you. After you configure it, click login in the top right and login to use octopi.

ALTERNATIVE

octocmd is a command line interface for octoprint. If you would rather not boot into the desktop then this is the way to go.