Learning air dribbles will actually permanently ruin your warm-ups forever. There are thousands of champs out there spamming air dribbles and free play and the saddest part about all of this, none of them will rank up. Learning air dribbles from my experience will actually ruin your warm-ups because now, anytime you get into free play, you're not going to be able to practice shooting, you're not going to be able to practice dribbling. Once you learn air dribbles, you're going to think they're useful and you're going to start trying to train them and you're going to start trying to use them in game and it just won't help.