I dont know what to do with my weight. how do i loose it all? im 13?

i am 13 year old girl and i weigh 56 kgs. im not sure if that is normal for a 13 year old girl but i think its too heavy and i want to find ways to easily loose weight. i cant go out for runs cos my mum thinks i might get kidnapped. shes very protective and she wont come with me because she is always busy. i want to know some easy ways to loose at least 10kgs. help please!!!!