What's your plan for changing human nature? Non-verbal communication of emotion is so important to human communication in general that it seems highly unlikely that any training scheme will overcome the dislike neurotypicals typically feel for communicating with people who fail at this ability. I think the concept of "uncanny valley" is relevant here, which is widely believed to be real by neurotypical people. Something which looks human but does not act as expected of something with human appearance supposedly produces instinctive feelings of revulsion in neurotypical people.

The only realistic option for low-risk in-person social interaction between autistic and neurotypical people who do not know each other well enough to predict emotional responses without needing to rely on real-time decoding of non-verbal communication (which is a learnable skill, but try having a conversation about an unrelated subject while busy programming to understand what it's like) is emotion-detecting AR glasses. The alternative is segregation, and lacking AR glasses, many autistic people do self-segregate.