Commercial chicken feed is optimal for a laying hen, minimum 16% protein if you feed no treats, recommend 20% protein feed if you feed treats. You can feed a laying hen diet (which already has needed calcium in the formula) or all-flock diet with calcium (oyster shell) in a separate container. Either way, make sure there's a container of grit available free choice for her if she eats anything besides commercial feed (scratch, treats, bedding, etc.). My personal favorite is Purina Flockraiser (all-flock), but there are many other good options. You can re-feed her her own egg shells and eggs, either cooked or raw - it's very nutritious for them. Sometimes I bake my shells to dry them out for better storage, sometimes not. I make sure to crumble the shells, as I don't want my chickens to start eating their own eggs. A fake egg or a golf ball in the nest box can encourage them to lay their eggs there.
If you cuddle your hen by your face at all, please wear wrap-around safety glasses that chickens can't get around or past. Some chickens will randomly peck you in the eye. You may never think it will happen to you, or that you can avoid it, and your hen will never show any signs, but then they take you by surprise. Wouldn't want you to be injured. It does happen.
Your hen will need a rock of some kind (e.g. cinderblock) to sharpen/wear down her beak on, or it may over grow. They trim their own beaks a little each day as they grow out. Toe nails may need clipping if she doesn't wear them down on their own. If you set the waterer or feeder up on a cinderblock so she can eat at head height and keep the shavings out of the food/water, this solves both issues.
Stuff folks commonly use as chicken bedding. The first product, if you add some small amount of water, turns into sawdust, then is easy to scoop the poops out of. Hopefully I've linked the correct product for you. Other stores may have better prices. If you can avoid putting her on wire, that would be more natural for her - they love to scratch the ground to find food. If you use a solid floor and bedding, you can broadcast Scratch grains or pelleted food and let her go crazy picking them out of the bedding. It's hilarious to watch and one of the favorite things chickens do. If you do end up with wire at least one person has had good luck with 1/2"x1" wire. (1/2"x1/2" is generally too small for the poops to fall through, and larger, their feet fall through).
Good luck and happy chickening!
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This is excellent information! Hope you enjoy her, she's gorgeous! And yes, please be careful with your eyes, it has happened to me before