How to set the default folder that opens when you open Finder:
- Open Finder
- Go to the top menu and click on Finder ❯ Preferences
While inside Finder Preferences click the New Finder windows show dropdown, and choose the folder you want to open up by default from now on when you open Finder:
By default, the dropdown shows you the most popular folders on your Mac, but you can click on Other... to choose a different folder.