I’m really into my sports. How long before I can get back to exercising after surgery?

Depends. It depends on the surgery and the type of exercise, but generally, once the surgical site is healed and any muscle or joint issues have been rehabilitated, you can return to full exercise. Talk with your surgeon for more specifics. Some types of exercise, not involving the surgical site, can often be started right away. Eg. Cv conditioning can be maintained with a hand bike after knee surgery.
Depends on the surg. Depends on the surgery. You need to clear this with your doctor's office. They have your specific information.