How can an autistic, eccentric person relate to neurotypical professionals in a social group?

I have always felt out of place amongst people who are neurotypical and conventional, especially businesspeople and I have decided to attempt to join a choir group full of lawyers, doctors, nurses and nannies. The choir teacher assures me that they're very friendly.

On the other hand, while I'm smarter than average (I've been IQ tested); I am a quirky, slightly eccentric person. I've not had any normal partners, jobs, or friends. My lifestyle is upper middle class. I know how to act like a lady and dress the part, but I am not used to being around typical, businesspeople with conventional or high flying lifestyles; and I wonder if I will be able to relate to them at all, considering I've spent all of my life living with my parents, struggling to find work, unmarried without kids and without a successful job. I spent my teens and twenties feeling severely depressed, having panic attacks and being generally mentally unstable, with the wrong dosage of medication. All my boyfriends were dysfunctional and all my friends are eccentric, Autistic people, of which I am one.

How can an autistic, eccentric person relate to neurotypical professionals in a social group?
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