Grats on getting your outfit!
For the shot, close the blinds in the background and use flash.
For your poses, what I did for my Miku ones, was just look at small pictures of him/her and copy them.
Here are some I enjoy:
http://images.wikia.com/vocaloid/images/2/29/Mikuo_Kei-Style.jpg (for this one maybe put your back hand in your pocket to seem less doll-like)
http://fc07.deviantart.net/fs45/f/2009/072/a/4/Hatsune_Miku_and_Mikuo_2_by_RinRin_Chan.jpg (I always thought this pose was cute)
Hope to see more pics! ^^