Launchpad shortcuts

In addition to what dialabrain said: the most convenient place to add “shortcuts” to commonly used folders is in Finder window sidebar.

You can put there just by dragging. Then use Command-N to open a new window and click the shortcut to go directly to the desired folder.

FWIW I also never use Launchpad either.

What kind of shortcut? There is already one available to assign to show and hide Launchpad in System Settings > Keyboard > Keyboard Shortcuts…

BTW, your signature indicates you are running Ventura but you posted in the Mojave community. If you are running Ventura your post can be relocated.

Personally I never use Launchpad. However, it's an application launcher. You can't add files or folders to it.