Help

Hi everyone, I am a French girl and I am 16 years old, I created this account to ensure that I can find a place to live because I would like to study in London after I finish school (so in two years time) and I really need help to know what I need to do, I know that everything can be Googled, but I think that your opinion would be better because you are studying somewhere what you want. And this might help me to know what I need to do (documents to leave my country... and so on... ). I don't know if it is fine to write it in French, but I wrote it in English and I am not a professional, I always learn English. If you are French, help me. Thank you for reading it. Goodbye.