What is JoJo's Bizarre Adventure About | First time reacting to Anime Openings 1-12

Never watched this show so I was curious if the anime openings will share some light what it is about. I think I'm more confused what the plot even is at the end but I tried my best to guess. Was I close? Way off? Should I just lose sleep and find time to watch? Leave a comment below sharing your thoughts about this anime.
Video used: https://youtu.be/-Gcj-pcFTbE?si=Jpr2exRyyMGctE1a

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