Explaining what ASD is.

I may have a job interview coming up soon and they know I'm Autistic. When I disclosed it to my current employer at HR they asked me what it is, how does it affect me. I explained its a spectrum and everyone is different, but its like asking someone to explain what being 'normal' or 'NT' is like. Being Autistic is normal, and as we're born with it and don't know any different. Does anyone have any advice on how to sum it up quickly, incase  its brought up in the interview? I get mind blank in certain situations, like shut down. I'm anxious incase they think being Autistic will have a negative effect on them employing me. Thankyou.