Составь рассказ о себе по английскому языку

I just wanted to introduce myself. Im Mike. Im 13 years old. Im not a child. However, one cannot call me an adult. I study at school in the 5th form. I am the best student in the class. Thats why I actively participate in all kinds of school activities. I have not so many friends. However, they all are very devoted. Like most of students, I have lack of free time. Still I like to paint or swim. Moreover, I play the guitar twice a week. Im fond of reading and playing computer games.