I appreciate your response, but there is no Pictures folder, and there are no pictures in Photos. Not sure what to do.
The Pictures folder may have a different name, or be hidden from the Finder sidebar.
Marc, what is the system Language your Mac is set to as the primary language in System Preferences > Language &Region? The folders "Pictures", "Desktop", etc. May be called differently, if the primary system language is not English. If the system languish is not English look for a folder named as "pictures" would translate to in the system language. The folder icon should be showing a camera badge:

The Pictures folder will always be visible if you open your Home folder (with the cute House icon), but you may need to enable the folder to be showing in the sidebar. Click somewhere onto the empty Desktop to bring the Finder forward, then open the Finder preferences from the main Finder menu bar: Finder > Preferences. Click the Sidebar tab and enable all folders, disks, etc you want to be showing in the sidebar:

Are there any photo libraries in the Pictures folder?