How to be very stylish?

Hey everyone.I am 12yrs old and i want to look stylish,My height is 5"3 and my weight is 40 kgs.I am very skinny and nothing suits me.So plz tell me what should i wear in summer this season.I hate jeans so tell me some other things.And yes everything should be in budget of a normal person.Not very expensive.Thanks in advance.