Let the journey begin.
It is early yet so why not visit the Open Animation Library: https://github.com/OpenAnimationLibrary
Or download Opentoonz: https://opentoonz.github.io/e/index.html
Perhaps explore some other versions of Opentoonz: https://tahoma2d.org/
Animation:Master is still cutting edge after all these years: https://www.hash.com/home-1-en
Perhaps visit a blog: https://newartofanimation.com/
Animation Monster 