Here’s a bunch of ideas for once you’ve taken the laser class and made the one thing you had in mind.
https://makezine.com/2019/04/15/40-laser-cutter-projects-to-take-you-from-beginner-to-advanced/
Just scrolling the main page (it’s a bunch of video links) I see two or three things I’d like to try, without even watching any of the videos 
