How to become a good soccer player?

Practice basic things like dribbling and passing. These are the essentials of the game. Once you get good at these you can start to build off of them. Practice dribbling through a line of cones slalom style, as you get better move the cones closer together. I improved my passing by passing the ball off the goal post over and over, as I got better I moved further out from the post. I can't help you very much with shooting as I am a defender, so this is all I can give you.