I assume that since this is a photography forum you mean to ask how to improve ones soccer photography, not soccer playing.
There are probably a few pros or near-pros on this forum who can give you better advice. But since nobody has responded yet, I'll give it a go. I was a soccer dad. So I studied how to maximize my success rate. It's hard, as you no doubt know. The field is large; the action is fast; you're can't be everywhere at the same time; and the action is usually happening where you aren't. Lastly, you want to get both faces and the ball in the shot. I would go a whole season and get maybe 3 or 4 shots that I was happy with. I shot with a 70-300mm lens. The long end was good for mid-field shots. But when the action comes right at you at the field boundary 300mm was useless. It happens too fast to switch lenses or grab another camera. You do have to be nimble on your feet in case you need to get out of the way. Use burst mode. f/5.6. Put the sun behind you. Never shoot into it unless you want silhouettes. Then try to guess where the action is going to be. I found that a position 1/3 from either end of the field had more action than the middle. The refs would get ornery if I got any closer to the goal posts because they thought the parent-me would cause me to become unprofessional.