dark spot / hyperpigmentation

hello,

i have oily acne prone skin manageable however now I'm left with the dark spot to deal with and a little bit of hyperpigmentation. In addition with my current routine and products using would like to add on few more products that i believe will help with my current issues. these products are Paulas choice 20% niacinamide, 10% azelaic acid, lactic acid, Can you please recommend on how to incorporate all these actives? would wish for a glass skin and yet a super duper health skin barrier,

Also, would you please recommend a moisturizer that is best for hyperpigmentation and that protects the skin barrier at the same time?

Thank you.