You could start playing soccer in whatever age you wanna play it. Ok. So no worries.
Mia Hamm started playing soccer when she was nine but she was 15 before she was in the women's soccer team and she was the youngest player to this day
Her brother was playing before her and her sister started after her.
You should ask your surgeon as they will know your case
there are clips on youtube of messi playing football at the age of 7/8 so before then i imagine
Abby started playing soccer when she was four