if it is cartilage damage, it wont unfortunately fix itself. I have had this 4 times in my knees (twice each). Each time the meniscus was trimmed back but in the last op they used staples to hold it together as it would then still do its job and removing it wouldnt help me in the long run..
what helped me was to build up my legs to take the strain off the knee..
i have a problem you dont have as yours seems to have been a result of a one time incident.. i had my leg straightened to realign things…massive difference.
stick to physio and workouts to build up muscle is what i’d do.
i’d perso avoid going down the route of arthroscopy if i could.
good luck