Have you ever had a runners/jumpers knee ? How much time it took to recover ?

A month when I was younger, but I learned to alternate with hot/cold therapy. It'll cut your recovery time in half.

To help the muscles that support the knee - invest in a foam roller.
This device helps, your leg muscles, your spine.
If you are not familiar with a foam roller - YouTube have many examples how to heal with this device.

Your recovery will speed up with the foam roller.

My niece did, over a year of recovery
(Apparently she broke shit)

Mine always gives me trouble, it hasn't been right since.

I have a torn ACL, had to get a cortisone shot last month, was too painful. Waiting for surgery.

I would be taking Serrapeptase to stop the inflammation for starters.