writing takes practice. You need to write every day to build your writing fluency.
1. To be a good writer, you need to all also be a good reader. Reading well-written books, blogs and articles, and paying attention to how writing is done, can have a direct impact on your own writing skills. Again, most of the reading assignments in school are complete turnoff for students. I highly suggest seeking out topics and authors that you enjoy reading, and not the ones your teacher assigns.