mainly English is focused on analysis and being able to evaluate. to analyse something is a skill that once developed stays with you forever. for example red curtains may be symbolic of anger and the fact that curtains are mentioned it may perhaps suggest that the antagonist desires to keep himself from the world or he may have secrets he wants unseen. "unseen" may mean insidious. you see how much analysis can change the way you write. also for a advert as an example, they would show two scenes one black and white and the other in colour. the black and white one may be somebody struggling with s hoover whereas the other somebody vacuuming happily. this is symbolic of the fact that the hoovering struggle is a thing of the past and is "old news. I'd say focus on analysis but don't take too much advice from me im 12