On the latest version of Photoshop (using Catalina on Mac), the entire app keeps freezing with no specific formula to get to the freeze. Sometimes it's when I immediately open the app and select File > New, sometimes it's well into a project and I'm selecting layers or using the pen tool.
Try resetting your Preferences. Hold Shift+Ctrl+Opt+Cmd down when you launch and hold until it asks if you want to reset. If you see the splash screen with no message, you weren't fast enough try again.