Arianna - Theme Installation
Unzip your downloaded file (SGAriannaPleaseUnzip.zip). Inside is a PDF and your theme file.
In your WordPress dashboard go to Appearance > Themes and click the Add New button.
Click Upload Theme then Choose File. Navigate to where you saved and unzipped your download, then select the theme .zip file (arianna.zip).
Click Install Now.
Click Activate to use your new theme right away.