Im 9 weeks post op acl. The surgery itself wont be a problem. The first two weeks post surgery will be critical. Undergo physiotherapy with due diligence.  The best exercise post op is to sit on a chair and extend your leg and hold for as long as possible. Do this multiple times a day. Gaining quadricep strength is key to regain leg extension. Sry for this unsolicited advice but i do my best to help a fellow traveller. PM me if you wanna know more about my journey.