Sean O'Casey did a wonderfully funny one act play, with only 3 characters, an excessively Catholic young man, a promiscuous young lady, and the young man's roommate. You could start there.
If you like, I'll write you some sketches, just give me some themes. Writing is what I do. (I also clean houses. That pays bills. ) As Hollowfox will tell you I write scripts for a comic book that a friend illustrates. They're very funny. Get in touch if you're interested. (Oh! No need to pay. Just give me credit, and spell my name right!)