Welcome to healthcare Magic.
Acne is due to your adolescent hormones and you will continue to have it till that hormonal influence is over. It might be 28 yrs or 30 yrs or even 32. Erytop is a topical antibiotic
gel(Clindamycin) which works against active pimples. You can use Benzoyl peroxide
2.5 % gel at night over pimple prone areas. Clearz plus is a lightening cream and is prescribed for dark marks. But it is a cream formulation, slightly oily which can again trigger new acne breakouts due to blockage of pores. I will recommend gel form of lightening agents like kojivit gel for dark post pimple marks, not on active pimples.
For the scars (pitted scars)you can approach a dermatologist
practicing cosmetology for procedures like microdermabrasion
, derma roller, chemical peels
etc. Dermatologist will decide the procedure after seeing the type of scars you have.
Avoid creams on your face. Avoid too much oil on your scalp. Diet is important. Avoid milk and milk products like cheese, chocolates, sweets, sugary foods and drinks. Eat a lot of fruits rich in vitamin A.
Hope this helped