Really effective ways to get rid of dark spots?

I have been in a battle with acne for a really long time. I would never once have a day where I didn’t have at least 5 zits on my face. So three months ago, my doctor essentially prescribed me the heavy guns to finally win my battle. I’ve been using Differin and Clyndamicin (not sure if I spelled the last one right) daily and see a big difference. Currently, I have no majorly noticeable bumps; there are a few really tiny ones but nothing to really worry about. The issue now is that I have a ton of dark spots aka my battle scars :( I still feel like I have to wear a bunch of concealer to cover them all up and while my medication helps with acne, the dark spots from the acne aren’t fading. What products are the best to solve my hyperpigmentation? I know people say use lemons and stuff, but let’s be serious here. None of those super natural remedies really work well if you need to see a MAJOR change. So what could I do to help speed this process along?