IMO Redux is a terrible way to start learning functional programming. There is too much boilerplate code and other code (ie. reducer, selectors, side effects, react components) that will confuse beginners and make the goal of learning functional programming harder.
It's like telling someone who wants to learn to drive, here's the road laws book, car manual, car service manual, offroad rally driving guide and engine tuning manual.
Redux was my first introduction to FP, and I loved it. You simply have to use Redux Toolkit that takes care of the ugly parts of Redux (namely: the boilerplate code), and it becomes a breeze to build things with Redux.
It's like telling someone who wants to learn to drive, here's the road laws book, car manual, car service manual, offroad rally driving guide and engine tuning manual.