It would be best to have a safe place for them to go at night where they can roost. They like to sleep up off the ground. I would shut them in at night and make sure it is safe from predators that will try to dig in and get them. If you do not give them a place to sleep where they will feel safe they will wander and look for ones themselves and can sometimes make strange choices.
I have a bantum cochin frizzle (which is a cochin who has feathers that stick out in the opposite direction) and a bantum silkie. If you are looking for more of a pet I would get a silkie. They are VERY sweet and silly. But, they are not good egg layers at all.
My cochin is a fairly good layer (but please be aware that any bantum hen will lay the little bantum eggs). She lays everyday when she is not broody. She is broody quite frequently (I would say every 2 months or so) and for that time she will not lay any eggs for a few weeks and just sits in her nest and is grumpy.
Neither of them can fly at all.
I would also recommend putting the nesting boxes in the coop. If the birds do not feel safe in the box you provide them, they will make their own next somewhere that may be hard to get to or unsafe.
I can send you pictures if you want to see what the hens look like or their egg sizes.
As a new chicken mom I would recommend reading about apple cider vinegar and diatomaceous earth.