What pharmacist products should I buy for Bright skin

[Walnut_cum]

Sun has tanned my skin over several years and my face has become bit darker and I have been using azelaic acid 10% for like 2 almost 3 months now and I started to use tretinoin for like 3-4 weeks and I haven't seen results yet. I feel like I am doing something wrong but I am applying moisturizer, gentle cleanser and sunscreen daily