You should use more formal language, for example kids - children, and use more persuasive language and demanding words, other than that, brilliant!
After months of watching De Lacey's family, the creature decided to introduce himself. The creature was surprised about what happened. Unlike the other people he had introduced himself to, De Lacey's family was kind and accepting, or so he thought. Since the man was blind, he could not see how hideous the creature actually was, so he let him in and agreed to listen to his story.
3/4 times by 20, which is 15
omg i in class write now and this wierd lady walked in. omg shes standing beside me. im weirded out i want to die. omg she just looked over my shoulder. thats it im out