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Bartosz Milewski’s Category Theory for Programmers lectures [1] are good. Especially paired with his book [2].

I actually find that category theory is remarkably simple. At least at the level where it applies to day-to-day programming concepts. The one major benefit I got from it, was that it helped me reason about high level/abstract structure better (which helps my architectural designs/thinking).

[1] https://youtube.com/playlist?list=PLbgaMIhjbmEnaH_LTkxLI7FMa...

[2] https://github.com/hmemcpy/milewski-ctfp-pdf



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