HI and Welcome,
I am sure there are plenty of people here will give you definate answers on these questions, I am still quite a newby here, but I have my first 4 chickens, I have 2 nesting places, and they take it in turns to go in them and make nest spaces, but they are not laying yet.
I do not have a light in the coup, and it has not been necessary as yet, they do get early sun if we have any, and I use a torch if I have to go out there in the dark just to check on them.
They roost now which took some time, but they have finally given up on their milk crate that was their preferred bed, and now sit side by side on the roost....lol.. but they are youngsters so I have let them find their feet so to speak.
But they are amazing fun and lovely friendly birds, so I am happy, Hope you enjoy the communiy here, and find your answers.
Welcome again,
Jena.