It's unlikely that anyone will laugh at you. As stated, it's a pretty mature community, where gear is expensive, and assholes don't get invited out much.
You sound capable of playing, so I think you should be fine if you come out!
What area are you in? I'm sure there'll be ASC members around you who'll bring you out to your first game, if you would like some support. If you're in the Greater Toronto Area, you're welcome to come out with me and my friends.