Hi, my name is (your name), I'm (your age) years old, I'm from (your country). I'm in (the name of your school)'s school, I'm in (your grade) grade and I like a lot the asignature of (your favorite asignature).
I live in my house with my (your family, mother, father, sister, etc). My favorite food is (your favorite food). My hobby is (your hobby). I have a (your pet) called (the name of your pet), (talk about your pet), I just love my (your pet).
My favorite kind of music is (your fave kind of music). I love (a band you like). My favorite song is (the name of your fave song).
When I grow up I want to be (what you want to be). I want that because (the reason).
Y lo que quieras agregar xd