How to create a keyboard shortcut to open a new terminal at your current Finder location. Like Ctrl+Alt+T / Alt+T in some Linux distros.

Open Automator and create a new Application. Add the following actions:
Run Applescript:
tell application "System Events"
set activeApp to name of first application process whose frontmost is true
end tell
if "Finder" is in activeApp then
tell application "Finder" to return the POSIX path of (insertion location as alias)
else
return the POSIX path of (path to home folder)
end if
Run Shell Script: open -b com.apple.Terminal "$@"
Save the Application as “Open Terminal Shortcut.app” and place it in your Applications or Utilities folder.
These actions could go directly in the Automator Quick Action (see below); however, if you place them in the quick action, the foreground Application running when you launch the service will need “access to control” System Events and Finder. That may be fine, if you only use the service while using Finder, but if you launch it when any other app is open, you will need to grant these permissions for each new app. It is far more convenient to create a separate app and grant the permissions only once.

With Automator, create a new Quick Action. Simply:
Save the Quick Action as “Open Terminal Shortcut”.
In System Preferences -> Keyboard -> Shortcuts under Services -> General, assign a shortcut for “Open Terminal Shortcut”. I used Ctrl + Alt + Cmd + T.