If you right click (option click) in the finder there’s a contextual menu that gives you some options. Here’s how to add an option under ‘Quick Actions’ to make a new text file.
The normal way to access your Google drive is to go into your browser, login to Google, then browse the files. Thus is a bit clunky. Thanks to a macOS app from Google, you can incorporate Google drive directly into the Finder to make it easy to access. Here’s how.