Rest may clear up some of your problems, the MCL sprain should be fine, The ACL if not ruptured and your knee is stable is usually not operated on, will you be able to play again who knows. The minsicus tears probably will not heal on their own, (MRI's are not always right on them either,) but only require surgery if they interfere with activities. You will not know that till the knees settles down.
Bottom line, at this point no one can be certain if you'll need surgery and no one can say if you'll be able to play again.
Follow your docs orders and if you are still having problems when you go back, ask for a referral to and OS who can more fully evaluate your knee. in the meantime RICE!
Hugs