The teen says he's learned quickly about how handle the press.
He told GQ: "One day they make you look like the new Messi and the next day they say that you have to stop playing.
"So the best thing to do is to concentrate on your own things and your own work, and think only to what the coach, who is the one who really wants to help you, and your teammates tell you."
On Barca, he continued: "I had the highest expectations, because at Barça not winning any titles is difficult. I think we had many ups and downs, especially in the league.
"And we weren't able to be consistent. For winning the La Liga, the Champions League, the Copa del Rey or the Spanish Super Cup you have to be consistent, and this is what we lacked, the fact that we didn't win anything lowers my rating a lot, to be honest."