Honey is a good 'baby food' for even adults when injured or ill. It's especially good for babies. I would mix a teaspoon in with a cup of water and let it drink that. It can help with shock and many other issues. I've used it with a lot of baby creatures of all species I've tended and it's saved may lives. Raw and unpasteurized is always best. It's a bit of an emergency tonic treatment.
Basically the only thing I know of that you can do is try to get the chick eating and drinking normally. If it's very weak, though, chances are the hatch is not the issue, but rather, there is something wrong with it which may render it unable to live. Babies fade fast if they are not viable. If it hatched under a hen it can be difficult to get it to listen to you when you try to show it food. Anyway, best wishes. I hope I'm wrong about there being something likely amiss with it.
Wrapping it in a blanket may not be a good idea. At that age they can't regulate their own body temperature so it can get too hot or too cold without a mother's body or an incubator keeping it at the right temperature. An external heat source it can move away from if too hot is the best idea. I've only reared chicks with their mothers so can't advise you on that, sorry.
