My face has become dull lately. I tried the Meladuse Ampoule. Is it okay?

It's so windy outside and the heater's always on inside, so my skin feels like it's drying out and becoming incredibly dry. By evening, all the moisture has evaporated, and my face feels like it's going to split. Just the other day, when I got home from work and was trying to take my clothes off, I saw my hair sticking out in all directions because of the static electricity, resembling a lion's mane. I was so embarrassed in front of the mirror for a while... As I age, my complexion seems to get darker and duller, and I worry about it every evening. Every time I look in the mirror, I sigh, so I took the courage to try the Meladuce Ampoule that a friend recommended. Honestly, my skin is so sensitive and timid that I get anxious whenever I try a new product. At first, I was worried that it might be too strong, so I tested it on the back of my ear and the back of my hand. Fortunately, the Meladuce Ampoule's formula is very sticky, but it absorbs smoothly into my skin without causing any irritation, which was a relief. After washing my face every night for about a week and applying a thin layer of Meladuce Ampoule to areas that are particularly dull, I feel a bit relieved these days because my skin texture has become much smoother when I wake up in the morning. I'm curious about how you all manage freckles and whitening in this dry and cold winter. Since I, a timid person like me, consistently use the Meladuce Ampoule, if you have any tips for creating even more synergy, could you please share them with me? It's already late at night, so I hope you all take care not to catch a cold and have a warm and comfortable time.