I know this is a really dumb question. How do I open a locker?

Well I am going to enter middle school next year and i need help. How do I open a locker!? Pardon me if it's pretty unbelievable that i cant open a locker. please help! and please don't complain or say stuff like "You're not even supposed to be on Y/A in the first place" I am safe. my mom monitors my account so i am safe.