While the shortened URLs that Microsoft Forms provides are shorter than the default URLs for Forms, they're still fairly long URLs that aren't exactly memorable. To create shortened URLs that people can actually remember and spell you'll want to use the custom URL shortening provided by services like Bitly, TinyURL, or Yellkey. All three of those URL shortening services are demonstrated in this short video.
On a related note, now that we're getting closer to the end of the school year you might be thinking about end-of-year surveys for students and parents. Here's how to use Microsoft Forms to create a survey.