Create your topic with your "art show" title and stick with it to update with more pictures and art.

You're able to upload SOME pictures on the forum hosting site but it would be great if you could just link the pictures from outside image hosting services. There are tons of free sites for that, you know what you're doing anyway since you're an artist.

If you're a newbie at it, try getting an account on deviantArt.com. I got one myself, I think that site promotes infinite doucherie but really helps getting your stuff online and make easy friends...

...but then you must post about your art so we can drool on it!