Suggest Remedy For Torn ACL

I am 56 years old and tore my ACL while snow skiing last week. I am trying to decide if I should have the tear repaired or not. My main form of activity is walking although I do like to do yoga sometimes. I know it's early but I am curious if there are things I can do to avoid surgery but still be able to be active or if I should have the surgery? If I have the surgery are there things I should do before surgery?