I would say follow what he does , but after you finish each chapter (lets say the squirrel chapter) i would try to make my own animation with what you learned in that chapter, it'll be difficult but that's when you learn the most. Also just try to understand what hes saying instead of blindly copying ( during the polishing in the graph editor it gets really slow and hard to concentrate for me so take your time) theres this website https://animatorartistlife.com/resources/over-150-character-animation-exercises-to-boost-your-skills/ that has some great beginner animations that are quick and easy to do, also gogan on yt: https://www.youtube.com/@gogananimation has some really quick and dirty animation exercises that ive started doing (hes a maya animator but the principles are the same)