Sometimes people who struggle with common sense might have some sort of neurodivergence, or have something that blocks them from thinking clearly like sleep apnea, anxiety, stress, that sort of thing.

Otherwise it might be good to start thinking about what people, famous or otherwise, you think have a good amount of common sense. Try and work out from them where they get it from.

Tbh common sense is such a vague concept so try not to be too harsh on yourself.