We've been stuck for 3 days with no change in appearance. Her cotyledon leaves never opened and there is no first set of leaves even starting. I'll let her go a few more days until I start a new seed of the same kind.
Good luck with this. If the shell doesn't come off , try to spray it with some water , let it soak a few minutes and carefully peel it off , if needed use some pliers
One of my Permanent marker autos died because the seed husk was stuck, and when I gently tried to remove it after spraying it with water, it ripped it in half. My other two permanent marker autos are doing okay. Roughly about the same size as yours
Take that shell off .. spray with water to soften and use a needle to carefully remove it before she dies...she can be saved .. but not if you don't act fast