For me, I think it is very important that you are interested in it. This will make you willing to train yourself. As far as I'm concerned, I like writing, just like my teacher. At one time, when I was a junior high school student, my teacher said that good writing is helpful to us, especially in exams. The same problem, because good writing can get more.
So, when you start to improve it, you should have a goal or interest.