How can i best get rid of my dark circles? and acne scarring?

Good question: There is not a good OTC medication that will do the trick.Your best bet is to see a dermatologist and let a professional fix your problem.

Acne scaring: Acne scarring can improve, but depending on the degree of scaring, you have to keep your expectations modest. Some options include : 1) Laser resurfacing ( fraxel or fractional co2 are 2 examples), 2) dermabrasion ( not microdermabrasion) , 3) deep chemical peels, 4) microneedling. It is best to have an evaluation by someone who performs these treatments.