The poses are good Tatiana. the spacing needs some work.A mathematical animator would open the Graph Editor and adjust the spline handles on the curves (they are the ones who can read colourful spaghetti). A visual animator would add more break downs to better define the arcs and spacing, creating the ease-in and ease-out needed to sell the weight of the jump. That'll be your job on the next jump. This is a fine effort introduction.