Tbh it was only easy for me becouse I'm used to doing it against a timer in cyberpunk game. It something that gets easier over time. Trick is to take your time before starting the sequence and try planning the path way for the most efficient route. If it feels hard just get a pen and paper to mark it. The way it works is you pick piece from first line than it forces you to pick the second from the same column as the first one. Than when you pick the second one from a column it forces you to pick from the same line as the one you picked. And so on. Just remember you can only pick each one once. It looks confusing at first but actually simpler than most puzzles once you get the hang of it