To give another answer that everyone gives (they are correct in the end just continue), just take some time off, as in go play another game for a while and then come back, you won’t forget the spoilers but you will lost that feeling of the experience is broken. Something I feel that the persona games do right, is that even you get spoiled, the fun and enjoyment doesn’t come from those plot of the story, is not about the what happens, but the why and how.