How can I customise my school uniform? (I'm on my sister's account)?

wear a belt, bracelet, fold you blazer to your elbow (girls do it in my school), wear eyeliner and some lip gloss or maybe eyeshadow if your allowed, wear a bright color plain headband so it will stand out, wear tights that have patterns on them, wear fashionable hoodies or even wear a skarf. Oh and wear shoes that are really cute. Wear a watch. Maybe add a belt to the middle of you jumper or shirt?That's all i could think or right now. hope i helped :)