I'm curious about the secret to clear, radiant skin.

These days, every time I look in the mirror, I feel a strange sensation. Before, my face seemed bright even after just washing my face, but at some point, I noticed my skin tone had become dull. It's frustrating to hear people say I look tired even after a good night's sleep. I'm especially envious of my friends' naturally radiant skin, so I've been experimenting with different skincare products. I diligently apply face masks and slather on moisturizers, but I'm not seeing the results I'd hoped for. Perhaps I need a fundamental clarity that cosmetics alone can't achieve? I've been diligently applying makeup base, hoping to achieve a subtle, radiant glow like celebrities, but it just falls off so quickly. What habits do you all practice in your daily lives? If you have any tips, even the smallest ones, for achieving a glow from within, please share them. I'm really curious to know how you all started your skincare routine.