From one unskilled player to another, enjoy the game. I can offer you no tips for getting better. I've had the game for a year or so and I've learned next to nothing. Heck, I celebrate hitting the ball. Get yourself a few friends and play together. Annoy them, learn with them, score own goals. It's all good fun friendo. As for actual tips on the game... I think @Chary and @AyanamiRei0 are good at the game, maybe they can help lol
Training mode is honestly the best way. Not only does it teach you how ton play every position on the field, the modes get harder to test your skill. Other than that, I would watch some guides on how to fly/freestyle. Also, use ball cam, cuz it's hard to use it if you get used to normal cam.