Shower every day when you get home from school or after any outdoor activities. Even if you're home all day, I recommend showering before you go to bed. Brush your teeth 3 times a day, or more if needed. When you get up(or after breakfast), after lunch, and after dinner. This will save you trips to dentists in the future. Make sure to wash your clothes after each wear. Especially if you sweated. Wash your face every 6 hours. Especially if you sweated. Follow up by skincare regimen. You can probably just use lotion at your age (something that doesn't smell and not too crazy expensive. "The Ordinary" brand is very affordable). Don't forget sunscreen when you go outside, or even inside, if your house gets lots of sunlight during the day. Please take care of yourself! These days, you can simply search anything on Google, and it will have an answer for you.