Do you have to physically describe yourself or describe your life? There are lots of people here on the writing feedback thread who will help edit it and everything, but this isn't the place for that. I would start off, like the others' said, writing some basic sentences. Where do you live? Where do you go to school? What are your hobbies? What are your goals? What is your home life like? And then write a paragraph that answers all those questions. Then you can post it to the feedback board and people will help you with your grammar and wording.