Soccer Pro...or maybe not

So we decided to try Carter in his first oganized sport...soccer.  We have done a small class before but that was not where he had practice or was even on a team. Unfortunatley is has not gone so well. He is so shy the first 10 minutes of practice he hides behind me.  He finally gets out there and plays and does well in practice but games are a different story.  His first game he refused to even go on the field. The second game we got him on the field and he actually kicked the ball but then he cried and wouldn't go back out on the field. I am hoping each week gets better. We are trying hard not to push and get frustrated since we know he is still very young and this is his first time to play.