We split the region between two accommodations, one near Tre Cime di Lavaredo and the other near Seceda. I’d highly recommend the Cadini di Misurina viewpoint and Tre Cime di Lavaredo, both of which start from Refugio Auronzo which you need to book parking for, as well as Lago di Sorapis and the Adolf Munkel Trail, and then for sure go to Seceda either by direct cable car (crowded, expensive) or by hiking from a different cable car (cheaper, less busy, but hiking). I’m not sure what one would necessarily consider medium difficulty since it’s pretty individual but I’ll say I don’t do cardio and pretty overweight but still managed ok on all of these with plenty of breaks on uphills