My own skincare method

Today, I went to a newly opened cafe with floor-to-ceiling windows with a friend, and I was really shocked when I looked in the mirror under the bathroom lights. I didn't notice it in natural light, but under the bright lights, I don't know why my skin looks so dry and dull. To be honest, until now, I've just been applying toner and lotion haphazardly, using laziness as an excuse. However, listening to the friends at the next table, I realized there are already so many people taking meticulous care of their skin. I feel like I've been too complacent, so I'm suddenly starting to feel anxious. I'm planning to set up a systematic skincare routine now, but what products should I start with? I'm deeply conflicted about whether I should focus on hydration first or if I should add a functional essence. How do you usually take care of your skin? I really want to hear valuable advice from those who have struggled with this as much as I have.