Playing Training mode is the best way to master the Controls of the game as it not only provides training for you to improve your shooting and passing skills it also gives you the opportunity to practice free kicks, saves, and penalty shootouts.
To access training mode just tap on 'My Club' followed by 'Training' and then press the pause button at the bottom left corner of the screen. To then switch to a different training mode, tap on the white arrow beside 'Free Training' to bring up the six types of training modules that are available. These are Free Training, Free Kick, Left Corner, Right Corner, Penalty and Penalty Save.
Even if you have top quality Players on your team you will still get bad results if you can't shoot or pass the ball so before you even think about playing league matches it is advised that you practice each module until you feel fully confident about passing, shooting, penalty kicks and saves.