Well, firstly I've learned that my lower back is pretty much untrained now, so although my legs are strong enough to squat, I have to be conscious of the fact my lower back is the limiting factor.
Secondly, I realise now that waiting for my back pain to disappear completely before I try squatting is a waste of time. My back is never going to be completely pain free until I stengthen the movement patterns. When my back is a little achey in the mornings, by the time I've foam rolled and done my mobility and core stuff, it feels fine. So I'm not going to wait another 3 months before attempting to squat again, more like a couple of weeks.
This sounds like a breakthrough. I have not been following every post, and of course I am not a doctor, but the default position is that exercising your back makes it stronger. If the pain is because of weakness, stronger would be good.
So starting light and and sticking with it sounds very reasonable. And as Jungledoc says, never apologize for your numbers. This is a rehab
effort, not a prep for a meet, so pick the weight that will make you stronger but not aggravate an injury.