I've tried getting into Category Theory many times over the past few years and the only thing that actually worked is Category theory for Programmers by Bartosz Milewski (lectures[1], book[2])

1. https://www.youtube.com/playlist?list=PLbgaMIhjbmEnaH_LTkxLI...

2. https://bartoszmilewski.com/2014/10/28/category-theory-for-p...