Ren'Py really isn't hard, it might be best for you do learn that end yourself, so that you can begin mocking up the game while waiting for an artist. There are plenty of people with artistic skill who just need a project to get behind first.
I was in the same boat as you back in January, I'm currently writing for 2 games for sure, a possible third is being negotiated now. It's just a matter of getting started and making a name for yourself.