And remember: There is no "correct" order. The best manga and anime is the one that makes you lose track of time at 3:00 AM.
Do you start with the "Big Three"? What is the difference between a Shonen and a Seinen? How do you transition from watching anime to reading manga? And remember: There is no "correct" order
Start with Demon Slayer for spectacle, graduate to Attack on Titan for story, and settle into Vinland Saga for philosophy. And remember: There is no "correct" order