Seconding the suggestions in my sibling comments. I think I managed to learn some category theory by haphazard clambering and osmosis of the material.

I’d like to add a recommendation for the book Category Theory for the Sciences: https://mitpress.mit.edu/books/category-theory-sciences

Archive.org seems to have it for download: https://archive.org/details/cattheory

(I prefer the printed copy myself, i.e. it has been worth having.)