Looking for a guide to explain neurotypical people.

Hello everybody.

I haven't posted in about a year, at the time I was deciding if I should get a diagnosis which I chose not to get. I am currently a uni student in Nottingham and it seems that it is very obvious I am on the spectrum, people either seem to spot it immediately or think I am weird.

I really need to improve my ability to interact with people. I struggle a lot in social situations and find people often act and respond to things in very confusing and irrational ways. I have searched for a guide to understand neurotypical people better. Things like body language, social interaction, how to respond in situations and understand them in general. However my searches have only resulted in finding a few guides explaining Autism for normal people but not the other way around.

Can anybody help me out?
Thank you