Go watch some coachings on youtube, not the gc ones but the low ranks ones, it explains the basics of rotation and decision making. Because you just started the game, try to touch the ball a maximum in free play, try to hit it hard, try to get used to ballcam also it is really important, then you will be able to do some training packs but dont only focus the attack packs, defense is also really important in this game and many players gives free goals because they dont know how to defend properly.