I've figured out the best way for me and probably most of us to learn social situations and it's under our noses.
Try to understand the process of collecting social information in sensory terms i.e. where to turn your visual attention, auditory attention, etc. in order to get the best information to act on.
And don't forget your peripherals.
If you feel like it's in reach make synesthesias for yourself that allow faster processing of the information.
Ultimately NTs are good at processing social information because their senses are subconsciously/unconsciously tuning themselves to the right "sensory coordinates" to get the information, so this is consciously replicating the same process.
This might not be a full solution. You still got to figure out what to do with this information once it is in your head, but it's a start.