How do you care for sensitive skin?

Hello.

In the past, I was fine using any cosmetics, but these days, my skin has become so sensitive that my face turns red even when I'm a little tired, so I'm having a lot of trouble these days.

Even if you look for a non-irritating product, it is not easy to choose because there are so many products for sensitive skin.

Could you recommend a gentle cleanser or basic product for anyone like me who has suddenly developed sensitive skin as they've gotten older? I'd love to hear advice from those facing similar concerns.