Go ahead. But I assure you, it will do very little to help you apart from the sake of research. As you progress through, particularly year 11 English, your ideas and perceptive of literature will change. The time spent on the major work will be better spent honing your English skills before you start the major work without any guidance from teachers. Ensuring you have a really solid idea even if it take you a considerably longer time is more of a priority than rushing into it and having to change your concept several times.