Darling...don't worry about it too much. its silly. enjoy life and take care of yourself without obsessing.
What you need is a great sunscreen. Japanese ss's are the bomb, personally, I love Mecca Cosmetica To Save face (aussie brand).
Also, an anioxidant. I've been rocking Cosmetic Skin Solutions CE+F serum for years. Its one of those products I will be using for the rest of my life.
A good gentle cleanser to take it all off. Aveeno Ultra Calming Foaming cleanser gets my vote. I like to follow with Mario Badescu Enzyme Gel Cleanser,left on for a few minutes. I use a few MB products in my kit too and find the models really like it and they perform just super.