little tip when drawing complex poses like this, imagine the character standing up straight with their arms at their sides. When drawing the character/sketching also imagine how much further/shorter the arm would be in comparison. I mention this because of the arm holding the ball - when I imagine it by the character's side and in comparison to the other arm I think it might hit the floor.
[this isn't hate or anything just advice from one artist to another because I also have arm issues]