New, to chickens, when I got mine, I got offered a cross beak free when I bought one of my other chickens. I got her at about 8 weeks, but she was only a bit smaller that the other, who was the same age. She is now about 19-20 weeks, and is still just a tiny bit smaller, but seems to be ok. Her beak isn't too bad, she can eat on her own, and has learned to turn her head when pecking to get more food. She does seem to be able to eat crumbles a little bit better than pellets, but what seems to help her the most is eating from a deep dish. I have been told that trimming her beak could help her more, but I haven't tried that yet because she seems to be doing fine with it like it is, but my dad came over today and we agreed to do it next time he comes, to see if it helps more, because I am hoping she will start laying soon.
That being said, I don't know how bad your chick is, but you could try trimming her beak and giving her a deep dish to eat from. Otherwise, you have gotten really good advice from others. Good luck!