well i couldnt get your pictures to work but i know what shape you are trying to draw. I would start with two sketchs and a loft operation. 1st sketch on the front plane. Draw a vertical reference line at the origin. Draw an ellipse of your dimensions and trim it at that vertical reference so you have a section. In your second sketch on the Right plane you will draw the other ellipse using that same center line reference. I took that line from the first sketch and Converted Entities. Then Loft between these two making sure to set your start and end constraints to "normal to profile". then you will have a 1/4 of the figure and can mirror it to produce the rest.
Also when you are creatings things in sketch mode using the properties panel this does not fully define them. you need to add dimensions and constraints to your sketches to fully define them. Skipping basic sketch constraints and dimensions is a bad idea when working in CAD