I would like to ask you about the proper form of the back lever. I made a video doing it and i found that my position was like this (photo is from crossfit .com)

As you can see his shoulder are forward and chest in, so the neck and head tends to go down. Shoud it be with chest out and expanded so the shoulder is neutral or backward?
I know the proper form is looking forward but in that position i find it very hard.
Thanks
