Don't want to pretend to be a coach but see if this helps:
Push out with the bow arm to set the hand position into the bow grip,
then raise the bow arm and drawing arm together, up to the position shown in the picture.
Keep the front shoulder in its normal low position.
(The shoulder must not be allowed to rotate up or back as this shortens the draw length.)
Keep the elbow of the drawing arm high during the initial draw phase, as this will help bring into action the back muscles needed to draw the bow to full draw.