Nice coop! I would keep them in the coop for about a week, just so they are comfortable in their new home. You said you have pullets, no cockerel? I find that my cockerels are always the ones telling the ladies when it is time for bed. Most of the time they listen, but like all women (myself included) the pullets sometimes have a mind of their own. Anyway, keep in for a week and then let them out a little longer every day. Make sure during that first week that you are giving them lots of treats so that they learn the sound of the worm bag, jar or bucket that you are using for treat time. That way, if they do happen to be wandering too late at night, you can give a shake of the treat container and they will come running.
Good luck!
Even all girls will put themselves to bed. 2 different aged flocks, both brooded inside- would line up at the door at night. If we were late, they'd knock.

Open the door, and they would parade in through the sunroom, past the kitchen eating area, through the kitchen, through the living room, and then would hop up and put themselves to bed in the brooder. It only takes a little bit if repetition for them to figure it out.