I remember when I was 17 I had a similar injury and missed more than 4 months due to it. It is not comparable as those are all professionals and train every day for the comeback, but the first games were a disaster. You start training, you feel comfortable in your body again and think you are ready to play like before. But that's not the case. Training is very different from games and I don't even talk about match rhythm. Every duel, first touch, the aggressiveness of the defenders, the pace of the game and the paths of your teammates. After being topscorer the season before I felt like an amateur playing the CL final. After the first two games I felt like quitting football because I easily was the worst player in my team back then. It really takes time till you perform on your usual level again.