What should I wear on Monday night?

I’m going out on Monday night, with friends, to a dinner party, in a pub, for people with Autism. I’m mildly Autistic, have mild Asperger’s Syndrome; was diagnosed late, mid twenties. I’ve lost a lot of weight and I’m beautiful now, but I’m socially awkward; and pretty much a big, raging nerd. I suck at flirting and a feel big and awkward and self conscious about my large, curvy body. I hope to meet someone I might like there, who might return my feelings; but it’s going to be boiling hot that night, so I can’t wear any of my really nice clothes. Is it ok to wear my black and white checked maxi dress and jazz it up with nice sandals, jewellery and some lip gloss? Will that help me to look a bit better?

What should I wear on Monday night?
Post Opinion