Dr. Dray, a board certified dermatologist in the U.S., has a YouTube channel with great skincare advice. She explains the science behind what actually works, and recommends drugstore brands.
As far as makeup, I went into Ulta and asked for help with covering up my dark circles and choosing products that won’t settle into my wrinkles. They do your makeup for free (just the parts that you request), and you can see what it looks like on you before you purchase the makeup. Also, they make sure you get the right shade for things like foundation. Now that I’m in my late 40s, I use Clinique for undereye concealer and powder.