How to learn English? I'm only 12,how to learn English？

It' me Hello,everyone.I'm a Chinese girl,my English name is sunny.I'm gald to here and introduce myself to you.I'm 13 years old.Now I'm in Grade Seven.I like listening to music and I like sport,too.BecauseI think it good for my health.I like English very much,and I can speak a little.My favorite singer is Lady Gaga,she is so sexy.I like her sings a lot,such as<Poker Face>,<Monster> and so on.I want a net friend who can help with my English.That's all.Thank you.