There's a simple way to launch any Application from a Service hot key. Launch Automator, make a new Quick Action [Service]. In the search bar, type Launch.
Hold down spacebar while pressing a key to launch or switch to an app. e.g.. Launch an app, open a website, or run a script. Spacebar S -> launch Safari ...
Run the shortcut: Control-click an item in the Finder, then choose Quick Actions > [your shortcut] from the menu. The shortcut is also available in the Quick ...