While PE is great keyboard exercise and includes many cool puzzles, I think it is bad way of rewiring your brain for functional thinking. Unless you'll do some

While PE is great keyboard exercise and includes many cool puzzles, I think it is bad way of rewiring your brain for functional thinking. Unless you'll do some exercises that explicitly require new ways of thinking (and read something), you'll probably end up struggling with writing java code in clojure. I advice to do some FP course and then solving some problems in functional way - when you already know the way.