I have to say, that for a first time keeper, while I would recommend the commercial hybrids, I wouldn't really recommend rescues for your first hens. They are already around two years old, and in hybrid terms, that's already getting on a bit. It's heartbreaking to start losing hens through illness (and yes, they are prone to certain illnesses) or just age. However, if you get commercial type point of lay pullets, you'll have lots of eggs for a couple of years from friendly little characters, and hopefully, minimal health issues while you learn.