/ic/ - Artwork/Critique

Hi, I am looking for advice from more experienced artists like you.
I have never done anime style but I am going to make a drawing for a lady friend (her character from her dumb "oc do not steal" days), It is a cat girl with a spear.
Where can I get a good pose for it? I just don't want to copy a cool drawing and it end up being too similar, or is it common for manga artists to re use poses and therefore ok if someone recognizes?
Forgive my english and thanks in advance.