Dont know why her beak is so long.
Could be the way she was caged?
I would snip off the tip with nail clippers.
Pecking others is prob just defensive pecks at this point.
How did you handle introductions?
Has she been quarantined before putting with the others?
I got 2 new ones (cochin and black Orpington) both same age as the current ones I have ( black and white Orpington). I just put them together and all was good till the new Cochin started pecking the heads of both of the black Orpingtons. She is always on the offensive. She will be fine with all of them until she gets tired of eatting or drinking.