The best way to get to be a published writer is to keep practicing. If you want to dance professionally, you have to practice every day. If you want to play baseball in the major leagues, you have to get out and throw the ball hundreds of times.
Writing requires the same thing.
You must practice which means you must keep writing and reading. Buy a journal for yourself. It doesn't have to be fancy. A simple three ring notebook will do. Put down in it what happened to you and write down how you felt about it.