This pose is called "One-Armed Variation Peacock pose (Pungu Mayurasana) and no that is not me in the picture and truth be told that may never be me. And I am OK with that. So we have the moral of the story in this blog right out in the open at the beginning of the story. It's OK that you can't do a certain pose. It's just OK.
Instead try and focus on what you can do. That's it, that's all I have to share. No drama or lecturing, just short, sweet and to the point. And of course....don't forget to breathe.