What kind of cosmetics would be good for managing blemishes? I was shocked when I looked in the mirror after returning from a trip.

I recently went on a trip to Jeju Island with friends. I had such a wonderful time breathing in the sea breeze and taking tons of photos in the sunshine. However, when I got home and washed my face as usual, looking in the mirror under bright lights, I noticed that my cheekbones looked particularly dull. In the past, I would have just thought my skin was slightly tanned, but now faint blemishes are starting to appear one by one, and I’m incredibly worried. I was particularly concerned because they don't seem to be covered well even with makeup, so I decided that I should start using a proper "melasma care product" now. I never thought I would be worrying about this kind of care when I'm still in my 20s. How do you all handle blemish care? I would be really grateful if you could let me know if there are any gentle yet effective melasma care products. I'm also worried that products too harsh might not suit my sensitive skin. I've been searching for information specifically on melasma care products because I want to do thorough research, but there are so many brands and types that it's really hard to choose one right away. Is there a good item that is safe to start with regardless of skin type? It would be very helpful if you could share your valuable experiences to help me make a choice.