How lucky am I to be alive? (electrocution)
Very lucky.  I was taught that 100 to 200 ma across the chest is the “death zone”.  It will cause fibrillation which does not go away by itself.  Below about 100 ma you get a good scare.  Above 200 ma the heart clamps shut but restarts when the current goes away (probably).
For typical skin resistance, 240 VAC is probably near worst-case.  That’s why the Europeans are so obsessively careful with their household electricity.