Remember, Adri theme (free) and Adri Pro (plugin), don’t install the pro as a theme.
Once you have the plugin and theme installed and activated, just follow these simple steps
1. create a page, call it home, assign it the page template “Portfolio” (right column under page attributes)
2. Go to settings > reading , select static page and select the page you just created as home.
3. Start uploading your portfolio under the ‘Portfolio’ Menu.