See you can blame it all on your cousin. You didn't do this voluntarily of your own volition. YOur cousin is the devil and he/she MADE you do it.
I think 2 barred rock hens would be a great start...for a few days...then add a few more hens. YOu don't have to have a roo for eggs...just if you want to have babies...and then you'll need to get an incubator...or 2 because you will want to have staggered hatches, of course.