I have been getting back out pretty regularly myself. I finally decided that it was worth the risk to get some PT for my knee, it was hampering my life too much. The PT I saw briefly a few months ago was standard issue pointless as provided by insurance, the kind where you see them for 5 minutes before being turned over to an intern watching 5 people. Went twice and saw that going nowhere.
A couple of weeks ago I signed on with a very good holistic PT and started twice a week 1 hour one on one work. Private room, all sanitized for each person, masks etc. I am making great progress and wish I had started this sooner, better now than not though. The pain is gone but for an occasional reminder when I am on very uneven ground, we are working on soft tissue manipulation in session and then I have work to do on the other days around posture and gait, no actual specific knee exercises but more on focusing on stabilizing muscle throughout my body. I don't have arthritis (what the Dr said) but have hyperextended it badly and had habits that kept exacerbating things. I am walking at the beach on sand 3 miles at a time barefoot 4 days a week virtually pain free. Hallelujah!