The first one I read was Fullmetal Alchemist from my middle school library which set a very high bar!!!! I wish I started with something worse because it set my standards impossibly high. As orson welles said I started from the top and I’ve been working my way down ever since… oldest release date might be red coloured elegy which I read recently and loved!! I’m very under read on older manga tho (and older comics in general)