Cleanse
Wash your face with a gentle cleanser twice a day, morning and evening, especially before bed to remove makeup and the day's dust. Avoid very hot water, as it dries the skin.
Moisturise
A moisturiser suited to your skin type helps protect its natural barrier. Even oily skin needs light hydration, because skipping moisturiser can make skin produce more oil.
Sunscreen in the morning
Sunscreen with a suitable SPF is one of the most important long-term skincare steps, even on cloudy days or if you spend most of your time indoors near windows.
Keep it simple at first
You do not need a ten-step routine. Three consistent daily steps are better than a long routine you will not keep up.
These are general tips. For persistent skin or hair concerns, please see a dermatologist.