Poor lonely little thing! It would be best if you can come up with a buddy from somewhere to raise with her. But lacking that, give her a mirror or two. Some fluffy or feathery material to cuddle into (but NOT stringy). For some of my smaller broods, I've made a little cave of sorts for them to hide inside; and they love it.
Put the heat source where it's 95-deg under the heat, or use a brooder heater - and place it so the chick can move under or away from the heat as needed to warm up or cool down. It will find the most comfortable spot on its own. Raise the heat lamp or the brooder heater an inch or two each week as she grows.
Cover the bottom with puppy pads or similar for now. I use cardboard covered with layers of paper towels. Make sure the flooring is NOT slippery. Dip the chick's beak into the water a few times, and sprinkle starter feed on the paper flooring. Tap your finger into the sprinkled feed; she'll come to you to investigate and learn to eat. Once you see she's eating, drinking and pooping normally, add wood chips to cover the floor.
You won't need a cover over it right now, unless it's just to keep your other pets out of the pen - but within a week or two, it will need a cover to keep her safely inside.
