clean by washing with a mild soap atleast twice a day. Pat it dry and do not rub it. Avoid picking or pressing the acne. You can also use Benzoyl peroxide 5% lotion or gel once at bedtime. An amount of lotion the size of a pea should be enough to cover most of your face. If your skin becomes red or peels, you are using too much of the medicine or applying it too often. If the symptoms persist then oral and topical antibiotics like Clindamycin and tretinoin/isotretinoin or accutane may be needed. Please consult a dermatologist in that case.
I hope it helps. Take care and please do keep me posted on how you are doing or if you have any additional queries. Kind regards.