Sunscreen really is the best advise. When you look at identical twins who have lived in different climates, one locale having much more sunlight, the twin in the sun all the time looks much older, skin is more wrinkled, more leathery, and more discolored. The SPF sun protection protects against UVB rays and visible damage from the sun. It also blocks out vitamin D absorption. If your skin is close to the same color all over, even where you are always covered by clothing, you are probably vitamin D dificient, no matter what color your skin is. Get tested.
Aside from that staying moisturized and exfoliating every so often helps. You can exfoliate with sugar, but it is kind of large grains for the face. And, moisturize with vaseline at night.
Also, eating well will help, plenty of vegetables of every color, and some fruits.
Don’t let yourself get too thin. Having extremely low fat percentage and underweight combined usually equals grey, dry skin, with more wrinkles.
AHA’s were very popular back in the day for reducing wrinkles. Some scientist decided that since pineappe pickers had no fingerprints, fruit acids remove wrinkles, burning the surface layer if the skin. There might be some sort of home recipe for it?