To do the clothes I began with the skirt. To make this I used a plane with an editable poly modifier. I extruded edges to get my preferred shape before I used turbo smooth and shell to give the skirt a shape and thickness. The scarf around the leg is another plane with the same modifiers as the skirt but a texture wrap of an American flag.
I thought the easiest way to do the blouse was to copy the body and delete any polygons I didn’t need, like the legs and hands. I scaled the copied shape to be just a bit bigger than the torso so it sits outside it. After adjusting the edge or the neck and hands to make the openings of the blouse I was happy enough with the item.
American flag for texture wrap: