Thanks for writing.
Acne is due to hormonal disturbances in young age.
It requires prolonged treatment.Treatment depends on stage of acne.
You can start with a good cleansing lotion like cetaphil for washing face.Start applying clindamycin
gel over affected area at day time.At night time you can apply benzoyl peroxide
2.5% gel .Apply it only in small amounts.
Follow this for one month and let me know about response.
Darkness of hands and palms may be due to vitamin deficiency
.Start taking multivitamin
Hope this will solve your problem.Take care.