I'm usually the same way with open world games like The Witcher, GTA, RDR, etc, but BG3 puts the story enough on the rails to keep me focused while still letting me make critical choices and enough freedom to explore so it feels amazing when I find little secrets or Easter eggs.
My buddy has played through it twice with 40 hour runs each.
I'm still on my first playthrough at about 70 hours and close to wrapping up act 3.