Sittting On Stomach Pin My Daughter Is Almost 11 Months And Can't Get Into A Sittting Position By Herself.?

My daughter is almost 11 months and can't get into a sittting position by herself.? - sittting on stomach pin

Is this something to worry about? She sits upright, if you pay in this way, but can not go from lying to sitting. I tried to show, but no luck. It is a very good track of their new favorite game explores the depths of his Exersaucer:)