Hello and welcome to BYC!
Some gentler breeds are Buff Orpingtons, Australorps, and Easter Eggers. There are many more though.
You may want to keep in mind that each chicken needs at least 4sq ft of coop space, 10sq ft of run space, 1ft of linear roost, and 1sq ft of ventilation. Also 1 nesting box per 3-4 hens.
Welcome to the coop! I use the Forums and Articles tabs at the top of the page to do research. You can get lost for hours. It's nice to know you are minutes away from getting help with questions and emergencies!