Eye makeup that covers sagging eyelids

Lately, the thing that bothers me the most whenever I look in the mirror is the area around my eyes.

In the past, it was fine just drawing a clear eyeliner,

Lately, perhaps because my eyelids are drooping a little and wrinkles are showing, I feel like my makeup isn't applying neatly.

When I apply eyeshadow, it settles into the wrinkles, and if I apply it heavily, it seems to make me look older...

No matter what I do, I'm not satisfied.

I'm thinking about buying an eye primer because I heard it's good, but I'm also curious if it really works.

Is there a step-by-step method that even a beginner like me can easily do?

Please share some eye makeup secrets to make my eyes look naturally defined even in middle age, or recommend any must-buy products. I would love to have some super simple tips that even a beginner like me can follow.