The shortcuts are right here: https://animationpaper.com/animation-paper-keyboard-shortcuts-for-pc/
I just quickly converted them to pdf, so you can download it here: https://animationpaper.com/wp-content/uploads/2020/04/AnimationPaper-ShortcutsPC.pdf
The above is for PC. Let me know if you need the Mac version. But basically you just replace Ctrl with Cmd on Mac and the rest is the same.