1.You can use Ketoconazole shampoo like KETOMAC- Once a Week.
2.For Pimples and Dark spots- Follow a proper face routine.which should include a facewash, Toner ,Moisturiser
Gentle Facewash- Cetaphil. At least 3times a day
Toner - Start with basic like organic Rose water
Moisturiser - Dr Sheth for Acne
You can Also use a Sunscreen- Mostly Gel based so that it will not affect your acne more.
Drink water and use
Vitamin C serum for night routine which will help your dark spots.
Next Steps
If you are concerned with Facial hair/ Irregular periods- Get checked For PCOS.
Health Tips
Wear mask/ scarf while travelling to avoid dust exposure. If you are applying makeup- wash your face twice(to deep cleanse and to remove makeup completely)