Niacinamide helps both in control of acne and pigmentation.
Also if you are having acne prone skin , it is advisable for you to add keratolytics like salycilic acid or glycolic acid based on your skin type and skin characteristics. You can use either peels or serums again that will depend on your skin type and character.
Next Steps
provide good clarity photos of your face . and consult with me online for futher detailed evaluation and prescription.