How do I start home care?

Yesterday, I met a college friend I hadn't seen in a long time, and she was so surprised by how clear and clean her skin was. Lately, I've been feeling a bit tired, but my complexion looks dull every time I look in the mirror. Seeing myself under the cafe lights really made me realize the need for better skincare. So, I've decided to start a regular home care routine. However, there's so much information on YouTube and online communities that it's overwhelming for a beginner like me, so I don't know where to start. Do you have any tips for simple home care routines that I can do at home? I'm especially curious about your secrets to smoothing my skin during the seasonal transition. If you have any simple, everyday habits that don't require expensive equipment, please share them with me. I'd be really grateful. I'm curious how you all improve your skin condition!