This may be of interest.
She is a behavioural researcher.
Of course, understanding non-verbal cues and knowing what to do is not the same as being able to do it. This is from an NT perspective. Nevertheless, knowing some of the rules may help.
Google "youtube vanessa van edwards" and you should get a number of videos, interviews with Chris Williamson, Jordan Peterson, Diary of a CEO.
(I'm struggling to paste the links from my phone.)
She also has some books, including Cues.
I think over the years I have realised some of these, but I subconsciously copy as part of masking. It would have been useful in my 20s and 30s.